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Von Duprin 9927 Surface Vertical Rod Parts: Complete Ordering Guide Monday, August 24, 2026

Von Duprin 98/9927 surface vertical rod exit device. Browse all 9927 SVR parts.

Quick Answer

The Von Duprin 9927 is the grooved-case surface vertical rod (SVR) configuration of the 99 Series exit device. It uses exposed top and bottom rods to provide three-point locking on double doors without a center post. The key parts you will order most often are:

Top rod kit: 050512 (for standard doors up to 7'1")
Bottom rod kit: 050514
Top latch kit: 050400 (post-October 1998 devices) or 050091 (pre-1998 retrofit)
Bottom latch kit: 050401 (post-October 1998) or 050090 (pre-1998 retrofit)
Center case: 109358 (SVR configuration, both panic and fire)
Rod guide package: 112063

The 9927 uses a grooved case. The 9827 has a smooth case. They are not interchangeable. Always verify your model number before ordering any part.

What the Von Duprin 9927 SVR Actually Does

The 9927 is the surface vertical rod configuration of the Von Duprin 99 Series, one of the most widely installed institutional exit device families in North America. It is designed for double door openings where there is no center mullion or fixed door post to mount a strike.

When someone presses the push bar, the center case mechanism simultaneously retracts a top latch bolt into a strike at the door head and a bottom latch bolt into a floor or threshold strike. This three-point engagement is what gives the SVR device its holding strength and is why it is specified on high-traffic egress doors in schools, healthcare facilities, government buildings, and commercial properties.

The rods run on the surface of the door face, which is what distinguishes the SVR from the concealed vertical rod (CVR) device. If you are working on a device where the rods are hidden inside the door stile, you have a CVR, not an SVR. See the Von Duprin 9947 CVR exit device parts guide for that configuration.

For a complete overview of how the 9927 fits within the broader Von Duprin product family, see the Von Duprin series guide.

9927 vs 9827: How to Tell Them Apart Before You Order

This is the most common ordering mistake on the 98/99 Series SVR device. The 9827 and 9927 look nearly identical in the field, but their rod kits and some center case components are not interchangeable.

Feature	9827 (98 Series)	9927 (99 Series)
Mechanism case	Smooth	Grooved
Top rod kit	050513	050512
Bottom rod kit	050515	050514
Center case (SVR)	109358	109358
Latch kits (post-1998)	050400 / 050401	050400 / 050401
Rod kits interchangeable?	No	No

The model number is stamped on the mechanism case, which sits in the center of the push bar channel. On the 9927, the grooved finish on the case surface is visible under good lighting even with the cover in place. If you are still unsure which device you have, call Security Parts at 845-935-0301 before ordering.

Von Duprin 9927 Surface Vertical Rod Parts: Every Category Explained

The parts catalog for the 9927 SVR divides into eight functional categories. Each one covers a specific area of the device and requires careful attention to configuration before ordering. Browse the full Von Duprin 98/9927 SVR parts catalog for the complete part listing with diagrams.

Vertical Rod Kits and Extension Rods

Von Duprin 98/9927 vertical rods and latches diagram. View all rod and latch parts.

The vertical rods are the most frequently replaced components on an SVR device. They wear at the latch engagement points and bend from impacts by carts, gurneys, and high-traffic door cycling.

050512 Top Rod Kit: Standard top rod for the 9927, handles doors up to 7 feet 1 inch. The rod is 34 and 15/16 inches long. Field adjustable for doors shorter than the standard height.
050513 Top Rod Kit: This is the 9827 top rod. Not for the 9927.
050514 Bottom Rod Kit: Standard bottom rod for the 9927. Rod length is 31 and a half inches, standardized by building code requirements that set the device centerline height at 39 and 5/8 inches from the finished floor.
050515 Bottom Rod Kit: This is the 9827 bottom rod. Not for the 9927.
ER-60 Extension Rod (60"): Required when the door height exceeds 7 feet 1 inch. Available in 12-inch and 36-inch extension lengths. Extension rod kits include the rod and the rod-to-rod connector hardware.

When replacing rods, also check the rod roll pins (090054), rod connectors (090067 for latch side, 090068 for center case side), and the rod extension connector package (090075). These small components wear alongside the rods and are cheap insurance against a callback.

Latch Kits: Confirm Your Manufacture Date First

Von Duprin changed the latch design in October 1998. The pre-1998 latches are not compatible with the post-1998 kits. Using the wrong latch kit is one of the most common service errors on older 9927 devices.

For devices manufactured after October 1998:

050400: Top latch kit, less cover. Used on the 2227, 3327A, and 9927 SVR devices shipped after October 1998. Includes the top latch assembly and mounting screws.
050401: Bottom latch kit, less cover. Same post-1998 application. The bottom latch on the 9927 interfaces with the floor or threshold strike.
050546: Latch mounting bracket kit. Used with 050400 and 050401 on post-1998 devices.
050566: Latch case cover kit for the 98/9927 and 9927-F. Covers both top and bottom latch cases.

For devices manufactured before October 1998:

050091: Top latch retrofit kit. Replaces and updates the pre-1998 top latch to the current design. If the bottom rod is dragging on the floor on an older device, a worn or failed latch is almost always the cause.
050090: Bottom latch retrofit kit. Same pre-1998 retrofit application.

Supporting latch hardware that wears alongside the latch assemblies includes the latch mounting package (900589), latch case cover screws (900850 in packs of two), and the rod guide mounting package (900919).

Rod Guide Package

The rod guide keeps the surface rods from bowing, deflecting, or bending under lateral impact from carts and equipment that pass through high-traffic doorways. On an SVR device, the rod guides are one of the first components to show wear.

112063: Rod guide package for the 98/9927. Sold in pairs. The current version of this guide includes a metal strap and a nylon bushing that the rod slides through, which is a significant improvement over the original spring-and-cover design.
900919: Rod guide mounting package. Includes the mounting hardware for the 112063 guides.

Check the rod guides whenever you are replacing rods. A bent rod on a properly maintained device usually means the guides have failed first.

Baseplate Assembly

Von Duprin 98/9927 baseplate assembly. View baseplate parts.

The baseplate is the mounting plate that secures the device to the door face. Baseplate hardware includes the sex bolt package (034902, pack of two), the mounting screw packages, and the baseplate itself. The sex bolt package uses the 325 hex head bolts and is required at both the top and bottom latch positions.

The baseplate assembly applies to both the panic 9927 and the fire-rated 9927-F. Confirm door thickness before ordering mounting hardware, as screw lengths differ between 1-3/4 inch and 2-1/4 inch door applications.

Center Case Assembly

Von Duprin 98/9927 center case assembly and LBR fire latch kit. View center case parts.

The center case is the heart of the SVR device. It houses the push bar mechanism, the dogging assembly, and the control link that operates both the top and bottom rods simultaneously.

The 9927 SVR uses center case 109358. This is a critical distinction: the rim device (98/99) uses center case 109012, and these two are completely different. Ordering the rim center case for an SVR device will result in a non-functional installation.

The center case for the double door configuration uses part number 109358 for both the panic and fire versions. If you have a double cylinder device (model 9927-2), you will also need the CC-CVR-2-98/9927 center case cover kit.

Internal center case components that can be serviced separately include:

090056: Top latch compression spring (pack of 10)
090057: Pullman latch spring (pack of 10), used when the device is equipped with a Pullman latch option
090058: Bottom latch case spring (pack of 10)
090065: Bolt return spring (pack of 10)
090076: Auxiliary bolt spring (pack of 10)

Dogging Assembly: Panic vs Fire Configuration

Von Duprin 98/9927 dogging configuration diagrams. View dogging diagrams.

Dogging allows the push bar to be held in the depressed position, effectively converting the exit device into a free-swinging door. This is used in high-traffic situations during business hours. The 9927 supports two types of dogging:

Hex dogging (HD) is the standard option. It uses a 5/32-inch hex key inserted into a socket on the cover plate to dog the push bar in the depressed position. The hex dogging shaft (090040) is the most commonly replaced dogging component. It strips when a misaligned hex key is forced into the socket or when the socket wears from repeated use.

Cylinder dogging (CD) replaces the hex key with a key cylinder. The technician turns the key to dog and undog the device. Cylinder dogging is used in applications where key control over the dogged state is needed. The CD option requires the specific cylinder dogging housing and actuator components found in the CD center case assembly.

The fire-rated 9927-F does not support dogging of any kind. A fire exit hardware device must latch every time the door closes, without exception. If you have a -F suffix on your model number, do not attempt to add dogging hardware.

For devices shipped before August 1997, old-style dogging parts apply. The old-style hex dogging replacement kit is 050153. See the service replacement items section in the 98/99 Series parts manual for the complete old-style parts list.

Fire Exit Hardware: The 9927-F and LBR Configuration

The 9927-F is the fire exit hardware version of the 9927 SVR. It carries UL listing for fire exit hardware and is certified to ANSI/BHMA A156.3 Grade 1. Understanding the differences between the panic and fire versions prevents ordering errors that result in non-compliant installations.

Feature	9927 (Panic)	9927-F (Fire)
Dogging permitted	Yes (HD and CD)	No
LBR (Less Bottom Rod) available	No	Yes
UL fire exit listing	No	Yes
Center case	109358	109358
Top strike	299	299F
Bottom strike (standard)	304L	304L
Bottom strike (panic-rated)	248L-4	248L-4

The LBR (Less Bottom Rod) configuration on the 9927-F removes the bottom vertical rod and substitutes a spring-loaded bottom latch. This is used in applications where a threshold or floor obstruction prevents a standard bottom rod and strike installation, or where ADA-compliant accessible thresholds are required. The LBR requires its own fire latch kit: 050171.

For a complete explanation of fire rating categories and what they mean for exit device selection, see the commercial door fire rating guide.

Strikes: Matching the Right Strike to Your Configuration

The 9927 SVR uses separate top and bottom strikes. Strike selection depends on whether you have a panic or fire device and whether you need a panic-rated bottom strike for high-security applications.

299: Standard top strike for the 9927 panic device. Mounts at the door header.
299F: Fire-rated top strike for the 9927-F.
304L: Standard vertical rod bottom strike. Used at the floor or threshold for both the panic 9927 and the fire 9927-F in most installations.
248L-4: Panic-rated vertical rod bottom strike for high-security applications. Provides additional holding strength compared to the standard 304L.

On wood doors, a wood door screw pack (964291) is required for the strikes. For doors where the strike cannot be recessed, an optional surface strike is available.

Electrified Options: EL, QEL, ALK, and RX

The 9927 panic device supports several electrified and monitoring upgrade options. These are specified when the opening requires access control integration, alarm monitoring, or electric latch retraction. None of these options are available on the fire-rated 9927-F.

Electric Latch Retraction (EL)

The EL option adds a solenoid to the push bar mechanism that retracts the latch bolt on an electric signal, allowing the door to be opened from the outside without pressing the push bar. The EL solenoid replacement kit is available for devices that have an existing EL installation. For devices shipped before January 1987, the old-style EL solenoid parts apply (050218 replacement kit).

The HD-EL combination option (hex dogging with electric latch retraction) is also available as a factory-installed configuration on the panic device.

ALK Exit Alarm Kit

The ALK kit adds a battery-powered local alarm to the 9927 push bar. When the push bar is depressed without authorization, the alarm sounds. The ALK is used in applications that require door monitoring without a full access control system. The ALK kit diagram and part numbers are available in the 9927 SVR parts catalog.

RX and LX Monitoring Options

The RX (Request to Exit) option adds a switch to the push bar that signals an access control system when the bar is pressed. The LX option (Latch Bolt Monitor) adds a switch that monitors the position of the latch bolt. Both provide real-time door status signals for building security systems. The RX and LX options apply to the panic device only.

For guidance on how these electrified options integrate with commercial door access control systems, see the exit devices parts guide.

Double Cylinder Configuration: The 9927-2 and 9927-2SI

Von Duprin 98/9927-2 double cylinder model. View double cylinder parts.

The double cylinder option (designated with the -2 suffix) adds a key cylinder to the outside of the device. This allows the latch bolt to be operated from the outside by key, in addition to the standard push bar operation from the inside.

The -2SI variant (Security Indicator) adds a visual flag that shows whether the device is in a secured or unsecured state. This is used in applications where supervisory verification of the lock status is needed.

Conversion kits are available for upgrading an existing 9927 to the double cylinder or security indicator configuration:

2SIKIT-2-98/9927: Double cylinder conversion kit for the 9927 series.
2SIKIT-2SI-98/9927: Security indicator conversion kit for the 9927 series.
CC-CVR-2-98/9927: Center case cover kit for the double cylinder configuration.

9927 SVR Parts Quick Reference by Part Number

Part Number	Description	Notes
050512	9927 Top Rod Kit	Doors up to 7'1"
050514	9927 Bottom Rod Kit	Standard length, 31.5 inches
050400	Top Latch Kit (post-Oct 1998)	Also fits 2227, 3327A
050401	Bottom Latch Kit (post-Oct 1998)	Also fits 2227, 3327A
050091	Top Latch Retrofit Kit (pre-Oct 1998)	Updates old-style latch
050090	Bottom Latch Retrofit Kit (pre-Oct 1998)	Updates old-style latch
112063	Rod Guide Package	Sold in pairs
109358	Center Case (SVR, panic and fire)	Not interchangeable with 109012 (rim)
034902	325 Sex Bolt Package (Pkg of 2)	Top and bottom latch mounting
050566	Latch Case Cover Kit	Covers top and bottom latch cases
050171	LBR Fire Latch Kit	9927-F only, Less Bottom Rod config
ER-60	60" Extension Rod Kit	Doors above 7'1"
299 / 299F	Top Strike (panic / fire)	Mounts at door header
304L	Standard Vertical Rod Bottom Strike	Mounts at floor or threshold
248L-4	Panic-Rated Vertical Rod Bottom Strike	Higher security applications

How the 9927 SVR Fits in the 98/99 Series Family

The 98/99 Series spans three primary physical configurations that cover different door types and architectural requirements. Understanding where the 9927 sits helps you navigate the catalog correctly when you are managing a facility with mixed device types.

Rim device (98/99): Single-point latch at the frame strike. Used on single doors. Center case 109012.
Surface vertical rod (9827/9927): Three-point locking on double doors without a center post. Rods visible on door surface. Center case 109358. That is what this guide covers.
Concealed vertical rod (9847/9947): Three-point locking on double doors where concealed hardware is required. Rods run inside the door stile. See the Von Duprin 9947 CVR exit device parts guide for that configuration.

For a complete side-by-side breakdown of all 98/99 Series configurations, see the Von Duprin 98/99 Series exit device parts guide. For configuration selection guidance across the entire Von Duprin product line, see the Von Duprin exit device series comparison.

Ordering the Right 9927 SVR Parts: What to Confirm Before You Place the Order

Getting the right parts the first time on a 9927 SVR comes down to five questions. Have the answers ready before you call or click.

Is the mechanism case smooth or grooved? Smooth is the 9827. Grooved is the 9927. This determines your rod kit part numbers.
Is there an -F suffix on the model number? If yes, you have fire exit hardware. Dogging parts do not apply. LBR may apply.
When was the device manufactured? Pre-October 1998 devices need retrofit latch kits (050090/050091). Post-October 1998 devices use the standard kits (050400/050401).
What is the door height? Standard rods handle up to 7 feet 1 inch. Taller doors need an extension rod kit.
Does the device have any options? Double cylinder (-2), security indicator (-2SI), electric latch retraction (EL or QEL), cylinder dogging (CD), and ALK alarm all require specific additional components.

Security Parts stocks OEM and aftermarket replacement components for the full Von Duprin 98/9927 SVR catalog. Same-day shipping on stocked components from US warehouses. Free shipping on orders over $450. If you need help confirming the right part for your specific device, call 845-935-0301 before the order goes through. Browse the complete Von Duprin 98/9927 SVR parts catalog or the Von Duprin parts hub for every other active series.

For context on the broader 98/99 Series service history and the part number changes that affect older devices, see the Von Duprin 98/99 Series parts manual. For guidance on selecting the right exit device configuration for a new or replacement installation, see the Von Duprin panic bar selection guide.

About the Author

This guide was written by the Security Parts team, a commercial door hardware specialist serving locksmiths, facility managers, general contractors, and service technicians since 2001. Security Parts stocks OEM and aftermarket replacement components for Von Duprin and other leading commercial door hardware manufacturers, with same-day shipping on stocked items and pre-order parts identification support at 845-935-0301.

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Von Duprin 9927 Surface Vertical Rod Parts: Complete Ordering Guide Monday, August 24, 2026

Von Duprin 98/9927 surface vertical rod exit device. Browse all 9927 SVR parts.

Quick Answer

Top rod kit: 050512 (for standard doors up to 7'1")
Bottom rod kit: 050514
Top latch kit: 050400 (post-October 1998 devices) or 050091 (pre-1998 retrofit)
Bottom latch kit: 050401 (post-October 1998) or 050090 (pre-1998 retrofit)
Center case: 109358 (SVR configuration, both panic and fire)
Rod guide package: 112063

The 9927 uses a grooved case. The 9827 has a smooth case. They are not interchangeable. Always verify your model number before ordering any part.

What the Von Duprin 9927 SVR Actually Does

For a complete overview of how the 9927 fits within the broader Von Duprin product family, see the Von Duprin series guide.

9927 vs 9827: How to Tell Them Apart Before You Order

Feature	9827 (98 Series)	9927 (99 Series)
Mechanism case	Smooth	Grooved
Top rod kit	050513	050512
Bottom rod kit	050515	050514
Center case (SVR)	109358	109358
Latch kits (post-1998)	050400 / 050401	050400 / 050401
Rod kits interchangeable?	No	No

Von Duprin 9927 Surface Vertical Rod Parts: Every Category Explained

Vertical Rod Kits and Extension Rods

Von Duprin 98/9927 vertical rods and latches diagram. View all rod and latch parts.

The vertical rods are the most frequently replaced components on an SVR device. They wear at the latch engagement points and bend from impacts by carts, gurneys, and high-traffic door cycling.

050512 Top Rod Kit: Standard top rod for the 9927, handles doors up to 7 feet 1 inch. The rod is 34 and 15/16 inches long. Field adjustable for doors shorter than the standard height.
050513 Top Rod Kit: This is the 9827 top rod. Not for the 9927.
050514 Bottom Rod Kit: Standard bottom rod for the 9927. Rod length is 31 and a half inches, standardized by building code requirements that set the device centerline height at 39 and 5/8 inches from the finished floor.
050515 Bottom Rod Kit: This is the 9827 bottom rod. Not for the 9927.
ER-60 Extension Rod (60"): Required when the door height exceeds 7 feet 1 inch. Available in 12-inch and 36-inch extension lengths. Extension rod kits include the rod and the rod-to-rod connector hardware.

Latch Kits: Confirm Your Manufacture Date First

For devices manufactured after October 1998:

050400: Top latch kit, less cover. Used on the 2227, 3327A, and 9927 SVR devices shipped after October 1998. Includes the top latch assembly and mounting screws.
050401: Bottom latch kit, less cover. Same post-1998 application. The bottom latch on the 9927 interfaces with the floor or threshold strike.
050546: Latch mounting bracket kit. Used with 050400 and 050401 on post-1998 devices.
050566: Latch case cover kit for the 98/9927 and 9927-F. Covers both top and bottom latch cases.

For devices manufactured before October 1998:

050091: Top latch retrofit kit. Replaces and updates the pre-1998 top latch to the current design. If the bottom rod is dragging on the floor on an older device, a worn or failed latch is almost always the cause.
050090: Bottom latch retrofit kit. Same pre-1998 retrofit application.

Rod Guide Package

112063: Rod guide package for the 98/9927. Sold in pairs. The current version of this guide includes a metal strap and a nylon bushing that the rod slides through, which is a significant improvement over the original spring-and-cover design.
900919: Rod guide mounting package. Includes the mounting hardware for the 112063 guides.

Check the rod guides whenever you are replacing rods. A bent rod on a properly maintained device usually means the guides have failed first.

Baseplate Assembly

Von Duprin 98/9927 baseplate assembly. View baseplate parts.

Center Case Assembly

Von Duprin 98/9927 center case assembly and LBR fire latch kit. View center case parts.

The center case is the heart of the SVR device. It houses the push bar mechanism, the dogging assembly, and the control link that operates both the top and bottom rods simultaneously.

Internal center case components that can be serviced separately include:

090056: Top latch compression spring (pack of 10)
090057: Pullman latch spring (pack of 10), used when the device is equipped with a Pullman latch option
090058: Bottom latch case spring (pack of 10)
090065: Bolt return spring (pack of 10)
090076: Auxiliary bolt spring (pack of 10)

Dogging Assembly: Panic vs Fire Configuration

Von Duprin 98/9927 dogging configuration diagrams. View dogging diagrams.

Fire Exit Hardware: The 9927-F and LBR Configuration

Feature	9927 (Panic)	9927-F (Fire)
Dogging permitted	Yes (HD and CD)	No
LBR (Less Bottom Rod) available	No	Yes
UL fire exit listing	No	Yes
Center case	109358	109358
Top strike	299	299F
Bottom strike (standard)	304L	304L
Bottom strike (panic-rated)	248L-4	248L-4

For a complete explanation of fire rating categories and what they mean for exit device selection, see the commercial door fire rating guide.

Strikes: Matching the Right Strike to Your Configuration

The 9927 SVR uses separate top and bottom strikes. Strike selection depends on whether you have a panic or fire device and whether you need a panic-rated bottom strike for high-security applications.

299: Standard top strike for the 9927 panic device. Mounts at the door header.
299F: Fire-rated top strike for the 9927-F.
304L: Standard vertical rod bottom strike. Used at the floor or threshold for both the panic 9927 and the fire 9927-F in most installations.
248L-4: Panic-rated vertical rod bottom strike for high-security applications. Provides additional holding strength compared to the standard 304L.

On wood doors, a wood door screw pack (964291) is required for the strikes. For doors where the strike cannot be recessed, an optional surface strike is available.

Electrified Options: EL, QEL, ALK, and RX

Electric Latch Retraction (EL)

The HD-EL combination option (hex dogging with electric latch retraction) is also available as a factory-installed configuration on the panic device.

ALK Exit Alarm Kit

RX and LX Monitoring Options

For guidance on how these electrified options integrate with commercial door access control systems, see the exit devices parts guide.

Double Cylinder Configuration: The 9927-2 and 9927-2SI

Von Duprin 98/9927-2 double cylinder model. View double cylinder parts.

Conversion kits are available for upgrading an existing 9927 to the double cylinder or security indicator configuration:

2SIKIT-2-98/9927: Double cylinder conversion kit for the 9927 series.
2SIKIT-2SI-98/9927: Security indicator conversion kit for the 9927 series.
CC-CVR-2-98/9927: Center case cover kit for the double cylinder configuration.

9927 SVR Parts Quick Reference by Part Number

Part Number	Description	Notes
050512	9927 Top Rod Kit	Doors up to 7'1"
050514	9927 Bottom Rod Kit	Standard length, 31.5 inches
050400	Top Latch Kit (post-Oct 1998)	Also fits 2227, 3327A
050401	Bottom Latch Kit (post-Oct 1998)	Also fits 2227, 3327A
050091	Top Latch Retrofit Kit (pre-Oct 1998)	Updates old-style latch
050090	Bottom Latch Retrofit Kit (pre-Oct 1998)	Updates old-style latch
112063	Rod Guide Package	Sold in pairs
109358	Center Case (SVR, panic and fire)	Not interchangeable with 109012 (rim)
034902	325 Sex Bolt Package (Pkg of 2)	Top and bottom latch mounting
050566	Latch Case Cover Kit	Covers top and bottom latch cases
050171	LBR Fire Latch Kit	9927-F only, Less Bottom Rod config
ER-60	60" Extension Rod Kit	Doors above 7'1"
299 / 299F	Top Strike (panic / fire)	Mounts at door header
304L	Standard Vertical Rod Bottom Strike	Mounts at floor or threshold
248L-4	Panic-Rated Vertical Rod Bottom Strike	Higher security applications

How the 9927 SVR Fits in the 98/99 Series Family

Rim device (98/99): Single-point latch at the frame strike. Used on single doors. Center case 109012.
Surface vertical rod (9827/9927): Three-point locking on double doors without a center post. Rods visible on door surface. Center case 109358. That is what this guide covers.
Concealed vertical rod (9847/9947): Three-point locking on double doors where concealed hardware is required. Rods run inside the door stile. See the Von Duprin 9947 CVR exit device parts guide for that configuration.

Ordering the Right 9927 SVR Parts: What to Confirm Before You Place the Order

Getting the right parts the first time on a 9927 SVR comes down to five questions. Have the answers ready before you call or click.

Is the mechanism case smooth or grooved? Smooth is the 9827. Grooved is the 9927. This determines your rod kit part numbers.
Is there an -F suffix on the model number? If yes, you have fire exit hardware. Dogging parts do not apply. LBR may apply.
When was the device manufactured? Pre-October 1998 devices need retrofit latch kits (050090/050091). Post-October 1998 devices use the standard kits (050400/050401).
What is the door height? Standard rods handle up to 7 feet 1 inch. Taller doors need an extension rod kit.
Does the device have any options? Double cylinder (-2), security indicator (-2SI), electric latch retraction (EL or QEL), cylinder dogging (CD), and ALK alarm all require specific additional components.

About the Author

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Electric Strikes Complete Guide: Fail-Safe vs Fail-Secure, Fire Doors, Lock Types and Troubleshooting Monday, August 24, 2026

An electric strike replaces the fixed strike plate in a door frame with a motorized keeper that releases remotely on a credential signal. The lock on the door stays mechanical: the inside lever or push bar always provides free egress. The electric strike only controls entry from the outside. Getting the fail mode right (fail-safe vs fail-secure) and the lock type right (cylindrical vs mortise vs rim) is the entire specification decision. Everything else is installation detail.

Electric strikes are the access control component most often specified incorrectly on commercial door hardware projects. The mistakes fall into two categories: the wrong fail mode for the door's life safety function, and the wrong strike type for the lock installed on the door. Both errors are easily avoided with a clear understanding of how each selection is determined. This guide covers both.

Browse electric strike parts at SecurityParts.com: Von Duprin electric strike parts for commercial access control applications, Von Duprin exit device parts for rim electric strike applications, Schlage L Series mortise lock parts for mortise electric strike pairings, and the complete Allegion access control hardware catalog.

How an Electric Strike Works

A standard fixed strike plate is a passive piece of hardware bolted to the door frame. The latchbolt from the lock extends into the strike pocket and the door stays closed until someone operates the lever from inside or uses a key from outside. An electric strike replaces this fixed plate with an electromechanical device where the keeper (the curved piece that holds the latchbolt) is connected to a solenoid. When the solenoid is activated, the keeper pivots or retracts out of the way, allowing the latchbolt to pass through without being retracted mechanically. The door opens by being pulled or pushed, with the latch still extended, because the keeper is not blocking it.

When the door closes again, the latchbolt re-engages the keeper and the door is latched without any electrical input. The solenoid only needs to activate long enough for the door to be opened: a brief pulse (typically 1 to 5 seconds) is sufficient. This is why electric strikes are energy-efficient in fail-secure mode: they only draw power during the unlock event, not continuously.

The trigger for the solenoid comes from the access control system: a card reader credential event, a keypad code entry, a push-button release, a motion sensor, or a remote switch all send a signal to the access control panel which then applies or removes power from the strike.

Fail-Safe vs Fail-Secure: How Each Works and When Each Is Required

The fail mode is the single most important specification decision for any electric strike. It is determined entirely by the door's role in the building's life safety plan, not by preference, security level, or budget.

Fail-Secure (Fail-Locked)

In fail-secure mode, the strike remains locked when power is lost. Power must be applied to the solenoid to unlock the keeper. When power is removed (either as the normal locked state or during a power failure), a spring extends the keeper and the latchbolt is held positively in the strike. The door cannot be opened from outside without a credential or mechanical key. Free egress from inside is always available through the mechanical lever or push bar, which retracts the latchbolt directly regardless of the strike's electrical state.

Fail-secure is the correct specification for perimeter security doors, storeroom doors, server room doors, restricted area doors, and any door where unauthorized entry during a power failure would be a security breach. It is also the correct specification for fire-rated doors, for reasons explained below.

Fail-Safe (Fail-Open)

In fail-safe mode, the strike unlocks when power is lost. Power must be continuously applied to the solenoid to hold the keeper in the locked position. When power is removed, the keeper releases and the door can be pushed or pulled open without any credential or key. Fail-safe is required on doors that are on a required means of egress and where the door does not have a mechanical means of free egress from inside when the lock is energized.

The life safety code basis for fail-safe is clear: IBC and NFPA 101 require that all egress doors be operable without a key, tool, or special knowledge during emergency evacuation. A fail-secure lock on a required egress door that loses power during a fire leaves occupants unable to exit through that door. Fail-safe eliminates this risk by ensuring the door always unlocks on power loss.

The single question that determines the fail mode: Is this door on the building's required means of egress, AND does it lack a mechanical means of free egress from inside when energized? If yes to both: fail-safe. If no to either (the door is not on required egress, OR the inside lever/push bar always provides mechanical free egress regardless of the electrical state): fail-secure is acceptable. Most commercial electric strike applications pair a fail-secure strike with a mechanical lock that always allows free egress from inside, satisfying the life safety requirement while maintaining outside security on power loss.

Why Fire-Rated Doors Require Fail-Secure Electric Strikes

This is the most commonly misspecified aspect of electric strikes, and the one with the most significant life safety consequence. The misspecification goes in the direction you might not expect: people install fail-safe strikes on fire-rated doors thinking "fail-safe is safer," and they are wrong about fire doors specifically.

NFPA 80 requires that fire door assemblies be positively latching at all times when closed. The latchbolt must engage the strike and hold the door in the closed position. A fire on one side of a door creates pressure that can force the door open if the latch is not positively engaged. If a fail-safe electric strike is installed on a fire-rated door, the keeper retracts when power is lost. With the keeper retracted, only the spring-loaded latch is making contact with an open pocket in the strike. Under fire pressure, the latch can be pushed right through the open pocket, the door opens, and the fire separation is compromised.

A fail-secure strike keeps the keeper extended when power is lost, maintaining positive latching. The latchbolt is held in the keeper as firmly as it would be in a standard fixed strike plate. The fire door performs as designed. This is why NFPA 80 effectively requires fail-secure on fire-rated doors, and why Von Duprin fail-secure strikes carry UL listings for both fire and burglary, while fail-safe strikes carry UL listings for burglary only. The listing label difference is the physical documentation of this code requirement.

The 2003 Cook County Administration Building fire and the stairwell reentry requirement it created: On October 17, 2003, a fire started on the 12th floor of a 35-story building in Chicago's Loop. People evacuating were directed into a stairwell, encountered thick smoke, were told to go back up, and could not reenter floors as they climbed because the stairwell doors locked against reentry. Six people did not survive. Others were hospitalized. This event is the historical origin of the IBC stairwell reentry requirement: stairwell doors must allow reentry from the stair side on every floor in buildings over four stories. This requirement is documented in NFPA 101 and cited in IBC commentary. Electric strikes cannot satisfy both the fire door positive latching requirement (needs fail-secure) and the stairwell reentry requirement (needs fail-safe) on the same door. They simply cannot do both simultaneously. The correct hardware is fail-safe electrified trim on a fire exit hardware device.

Browse Von Duprin fail-secure electric strike parts for fire-rated door applications at SecurityParts.com.

Lock Type Compatibility: Cylindrical, Mortise, and Rim Exit Device

Electric strikes are not interchangeable between lock types. Each lock type presents a different latchbolt geometry, projection length, and mounting position that requires a specifically designed strike keeper. Installing the wrong strike type produces a latch that either cannot engage the keeper, binds against the frame, or provides insufficient security engagement.

Cylindrical Lock Electric Strikes

Cylindrical locks (Schlage ND Series, AL Series) use a spring-loaded latchbolt with a 1/2-inch to 5/8-inch throw. Standard ANSI electric strikes are designed for this geometry and are the most common commercial electric strike type. The ANSI prep in hollow metal frames (the standard cutout for the fixed strike plate) accommodates most ANSI electric strikes with minimal additional frame preparation. One critical installation detail: the deadlatch auxiliary plunger on a cylindrical lock must not contact the electric strike keeper edge. If the plunger falls behind the keeper when the door is closing, it can bind the strike and prevent the keeper from resetting after the door closes. Verify clearance between the deadlatch plunger and the strike keeper edge during installation.

Mortise Lock Electric Strikes

Mortise locks (Schlage L Series) have a latchbolt throw of up to 3/4 inches, which requires a deeper keeper pocket than a cylindrical strike provides. Mortise electric strikes have this deeper keeper pocket. An important limitation: mortise electric strikes only release the latchbolt. The separate deadbolt on a mortise lock is a true deadbolt with no spring return. The electric strike cannot capture and hold a deadbolt: if the deadbolt is extended when the door is opened, the deadbolt projects out and the door closes with the deadbolt extended into empty space. The deadbolt must be retracted before entry through a mortise electric strike, either by keying the deadbolt or with electrified mortise trim that controls the deadbolt electrically.

Rim Exit Device Electric Strikes

Rim exit devices use a Pullman-type latchbolt that is geometrically different from a cylindrical or mortise latch. Rim electric strikes are specifically designed for this geometry and are significantly larger and heavier-duty than cylindrical strikes. They semi-surface mount rather than recess fully into the frame. For double doors with surface vertical rod (SVR) exit devices, the bottom rod is typically deactivated and locking occurs only at the top of the door with a single rim electric strike. The top rod latch type (Pullman, carriage, pin) must be confirmed before selecting the keeper style in the rim electric strike.

Browse Von Duprin electric strike parts for cylindrical, mortise, and rim applications at SecurityParts.com.

Power: 12V vs 24V DC, AC Buzzing, and Wire Run Sizing

DC vs AC: Why Buzzing Happens and How to Fix It

AC-powered electric strikes buzz. The solenoid vibrates at the frequency of the alternating current (60 Hz), producing the characteristic noise. DC-powered strikes operate quietly: the solenoid activates with a soft click and holds silently. For any commercial installation where the electric strike is in a lobby, office entry, or anywhere occupants can hear it, DC power is the correct specification. AC is acceptable only in industrial or mechanical areas where ambient noise masks the buzzing.

If an existing installation is buzzing, add a rectifier between the transformer and the strike to convert AC to DC without replacing the power supply. A rectifier converts the AC waveform to pulsing DC, which significantly reduces solenoid vibration. For the quietest operation on a retrofit, replace the AC supply with a dedicated DC power supply.

12V vs 24V: Voltage Drop on Long Wire Runs

Both 12VDC and 24VDC are standard for electric strikes. For new installations, 24VDC is the better specification: at equal current draw, 24V delivers twice the power, and voltage drop over long wire runs is half as significant as at 12V. For wire runs over 200 feet, a 12V system may not deliver sufficient voltage at the strike to reliably actuate the solenoid. Check the manufacturer's voltage drop tables before finalizing wire gauge and run length. If an existing 12V installation shows intermittent strike release (works sometimes but not others), check the voltage at the strike terminals under load (when the access control panel triggers the release). If the voltage has dropped below the strike's minimum operating voltage, increase the wire gauge or switch to 24V.

Power Supply Sizing: Inrush Current, Not Holding Current

Sizing the power supply to the steady-state holding current is the most common power supply error in electric strike installations. Electric strikes have a momentary inrush current when the solenoid first activates that is significantly higher than the holding current. Size the power supply at 150 percent of the peak inrush current of all strikes that could activate simultaneously. A power supply sized only to holding current may actuate one strike reliably but fail to actuate multiple strikes when they trigger at the same time.

Common Electric Strike Troubleshooting

Strike Not Releasing When Triggered

Check voltage at the strike terminals under load (while the access control panel is sending the unlock signal). Use a multimeter. If voltage is present but the strike does not release, the solenoid may be failed and the strike needs replacement. If voltage is low or absent, check the power supply output, wire connections at the panel, and wire continuity. Voltage drop over long runs is the most common field failure cause.

Strike Releases But Door Does Not Open

The keeper has released but the latch is still engaged in the keeper pocket under door preload pressure. Door preload occurs when the door is pressing against the frame (from air pressure, tight weather stripping, or a slight warp). The latch presses against the keeper even when it retracts. The fix: check door gap at the strike side, adjust the door stop if it is pulling the door too tightly against the frame, and verify that the strike lip is aligned correctly. Some strikes have adjustable lip length to accommodate door gap variation.

Deadlatch Plunger Binding the Keeper

On cylindrical lock installations, the auxiliary deadlatch plunger sits beside the main latchbolt. If the strike keeper geometry allows the plunger to fall behind the keeper edge rather than riding over it, the plunger binds the keeper in the retracted position and the keeper cannot reset after the door closes. This prevents the door from latching on the next closure. The fix: verify that the strike is the correct model for the lock, check the plunger clearance in the strike pocket, and if necessary use a strike with a guard plate or plunger deflector.

Strike Buzzing on DC Power

If a strike that should be DC-powered is buzzing, check whether the power supply output is truly DC or actually AC using a multimeter on the AC voltage setting. Some inexpensive power supplies labeled as DC output deliver unfiltered rectified AC that still contains significant AC ripple. Replace with a filtered, regulated DC power supply.

For electric strike troubleshooting support and OEM replacement parts, contact SecurityParts.com at 845-935-0301 or the SecurityParts.com contact page.

Why Choose SecurityParts.com for Electric Strike Parts

We document the specific NFPA 80 reason fail-safe electric strikes cannot be used on fire-rated doors: keeper retraction on power loss removes positive latching, allowing fire pressure to push the door open. We document the Cook County Administration Building fire as the origin of IBC stairwell reentry requirements and the specific reason electric strikes cannot solve both fire door latching and stairwell reentry simultaneously. We document the deadlatch plunger binding failure mode that is the most common field installation problem on cylindrical lock electric strike applications. We document the 150 percent inrush current rule for power supply sizing and the 200-foot wire run threshold for 12V vs 24V selection.

Browse Von Duprin electric strike replacement parts, Von Duprin exit device parts for rim electric strike pairings, and Schlage L Series mortise lock parts for mortise electric strike applications. Free shipping on orders over $450. Same-day shipping from US warehouses. 30-plus years of commercial door hardware experience.

Frequently Asked Questions

What is the difference between fail-safe and fail-secure electric strikes?

Fail-secure stays locked when power is lost: power is applied to unlock, spring holds keeper locked without power. Required where security must be maintained during power failure. Fail-safe unlocks when power is lost: power is applied to lock, keeper releases without power. Required on required egress paths where doors must always allow exit during emergencies. The correct fail mode is determined by the door's life safety role, not by security preference.

Why must electric strikes on fire-rated doors be fail-secure, not fail-safe?

NFPA 80 requires fire doors to be positively latching at all times when closed. A fail-safe electric strike retracts its keeper on power loss, leaving only a spring latch in an open pocket. Fire pressure can push the latch through and open the door, compromising the fire separation. A fail-secure strike keeps the keeper extended on power loss, maintaining positive latching. UL listings confirm this: Von Duprin fail-secure strikes carry UL fire and burglary listings; fail-safe strikes carry only a burglary listing.

Can electric strikes be used on stairwell doors that require reentry?

No. A fire-rated stairwell door needs fail-secure for positive latching (NFPA 80) and fail-safe for stairwell reentry (IBC over 4 stories). No single electric strike can satisfy both simultaneously. The correct hardware is fail-safe electrified trim on a fire exit hardware device: the trim unlocks the stair-side lever for reentry while the fire exit hardware maintains latch engagement for fire door compliance. The origin of the reentry requirement is the October 17, 2003 Cook County Administration Building fire in Chicago, where six people died after being unable to reenter floors from a smoke-filled stairwell.

What are the different electric strike types for cylindrical, mortise, and rim exit device locks?

Cylindrical: standard ANSI strikes for 1/2- to 5/8-inch latchbolt. Most common. Check deadlatch plunger clearance at keeper edge. Mortise: deeper keeper pocket for up to 3/4-inch latchbolt. Only releases latchbolt, not deadbolt. Rim exit device: Pullman-type geometry, larger and heavier-duty, semi-surface mounted. Not interchangeable with cylindrical or mortise strikes. Always verify compatibility with the specific lock model, not just the lock type.

Why does an electric strike buzz, and how do I fix it?

AC-powered strikes buzz because the solenoid vibrates at 60 Hz. Fix by adding a rectifier to convert AC to DC, or replacing the power supply with a filtered DC supply. If a DC strike is buzzing, the power supply may be unfiltered rectified AC with significant ripple. Test with a multimeter on AC voltage setting at the strike terminals: true DC should show near-zero on AC setting. Replace with a regulated DC supply.

What is the correct power supply voltage for electric strikes and how do I size the power supply?

Prefer 24VDC for new installations: half the current draw of 12V at equal power, better performance on long wire runs. For wire runs over 200 feet, 12V may not deliver sufficient voltage reliably. Size the power supply at 150 percent of the peak inrush current of all strikes that could activate simultaneously, not to the steady-state holding current. An undersized supply fails to actuate multiple strikes simultaneously even if it handles a single strike reliably.

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Commercial Door Hardware for Parking Garages: Exit Devices, Stairwell Locks and Corrosion-Resistant Hardware Guide Saturday, August 22, 2026

Parking garages are one of the harshest environments for commercial door hardware. Road salt, moisture, vehicle exhaust, and extreme temperature swings destroy standard commercial hardware in a few years. Stairwell doors in structures over 4 stories have specific reentry requirements under the IBC. Exit devices on pedestrian doors need to be Grade 1 and, on exposed or semi-exposed openings, should carry the Von Duprin OUT outdoor-rated designation. This guide covers what you need, why the environment matters, and how to order the right parts.

A parking garage looks simple on paper: concrete, cars, and a handful of pedestrian doors. In practice, it is one of the most demanding hardware environments in commercial construction. The combination of road salt chlorides, condensation from temperature swings, vehicle exhaust, andonstant mechanical use from people who are often carrying items or moving quickly creates failure rates that surprise property managers who spec standard commercial hardware and expect the same service life they get from interior office building doors.

Browse parking garage hardware parts at SecurityParts.com: Von Duprin OUT outdoor-rated exit device parts for parking garage stairwell doors, LCN 4040XP EDA door closer parts for parking garage pedestrian entries, Schlage ND Series cylindrical lock parts for stairwell interior doors, and the complete Allegion hardware catalog.

Why Standard Door Hardware Fails in Parking Garages

The failure mechanism is not complicated: chloride ions from road salt eat through steel-based hardware finishes and reach the base metal. Once the base metal is exposed, corrosion accelerates. Standard commercial finishes like satin chrome over zinc die-cast or painted steel over carbon steel are not designed to resist the chloride concentration you get in a parking structure that serves a northern climate market for six months of the year.

There are four specific conditions that together create this environment. First, direct moisture from rain, snow, and wash-off from vehicles entering the structure. Open-sided garages have no wall protection from weather. Even enclosed garages see condensation on hardware surfaces from the temperature differential between outside air and interior air. Second, road salt tracked in on tires. Every vehicle that enters in winter months brings chloride-laden slush into the structure. It evaporates. The chloride stays. Third, vehicle exhaust. Combustion byproducts create slightly acidic condensation on surfaces, which accelerates the corrosion process on both finishes and lubricants inside hardware mechanisms. Fourth, temperature swings. A northern garage might see ambient temperatures ranging from negative ten degrees to positive ninety degrees Fahrenheit across a year. Hydraulic closer fluid viscosity changes with temperature, and hardware finish adhesion is stressed by this repeated thermal cycling.

The practical consequence: a standard commercial exit device or cylindrical lock installed in a parking garage stairwell that sees high salt exposure will typically show visible corrosion within two years and functional failure within three to five years. Hardware specified for the environment lasts a decade or more.

The corrosion that happens inside the mechanism, not just on the surface: Property managers who specify outdoor-rated finishes but standard internal mechanisms are partially solving the problem. The visible surface corrosion is arrested. But standard internal springs, cams, and latch components made from carbon steel still corrode when chloride-laden moisture enters the mechanism case through gaps in the housing. Von Duprin's OUT designation modifies both the external finish and the internal components and adds weep holes to drain water that enters the case. Hardware specified for outdoor exposure should carry the OUT designation throughout, not just a corrosion-resistant finish on standard internal parts.

Von Duprin OUT Option: Outdoor-Rated Exit Devices for Parking Structures

Von Duprin's OUT option is available on the 98/99 Series exit devices and designates a configuration specifically engineered for moisture, temperature variation, and corrosion resistance in exterior and semi-exposed applications. Von Duprin describes OUT as designed for courtyards, perimeter security, rooftops, and patios: the same environmental conditions present in open parking garage stairwells and pedestrian exit doors.

The OUT designation includes corrosion-resistant coatings on internal mechanism components, hardware selected for outdoor exposure throughout the device, and weep holes in the mechanism case that allow water to drain rather than pool and corrode internal parts. For parking garage stairwell exit doors that are open to exterior air and moisture, the OUT option is the correct specification for the 98/99 Series exit device.

The Von Duprin 22 Series is also worth considering for parking garage stairwell applications. Von Duprin specifically identifies the 22 Series as ideal for back-door employee entrances and parking garage stairwells. The 22 Series is a medium-duty touch bar device (not push pad) designed for medium to low traffic openings where aesthetics and cost are considerations. For low-traffic stairwell doors in smaller parking structures, the 22 Series provides a simpler, more economical alternative to the full 98/99 Series. Browse Von Duprin exit device parts for parking garage applications at SecurityParts.com.

Stairwell Requirements in Parking Garages Over 4 Stories

The IBC requires stairwell reentry on buildings and structures over four stories above grade. NFPA 101 includes similar provisions. The intent is to prevent occupants from being trapped in a stairwell during an emergency: if every stairwell door allows reentry from the stair side on every floor, a person who enters the stairwell can exit at any level if the stairwell becomes unusable and find an alternative means of egress.

In a parking garage context, this means that in a structure with more than four levels above grade, every stairwell door must be equipped with hardware that allows reentry from the stair side without a key. The stairwell doors are still self-closing and positively latching (fire exit hardware on fire-rated enclosures), and they can be secured against entry from the parking floors during after-hours periods using electrified access control. But the stair side must always allow exit.

Fail-Safe Electrified Trim for Stairwell Reentry

The most common hardware for parking garage stairwell reentry doors is fail-safe electrified trim on a Von Duprin exit device. The exit device provides the push-bar egress from the parking floor side and the fire exit hardware listing for the fire-rated stairwell enclosure. The electrified trim on the stair side is fail-safe: it unlocks automatically on power loss, ensuring that anyone in the stairwell can reenter a floor even during a power failure. During business hours, the trim is typically unlocked for free access. During after-hours periods, the access control system can require a credential on the parking floor side while maintaining free reentry from the stair side.

Browse Von Duprin exit device parts with fail-safe electrified trim for stairwell reentry at SecurityParts.com.

Door Closers for Parking Garage Pedestrian Entry Doors

Parking garage pedestrian entry doors see high cycle counts from commuters, shoppers, and building tenants moving quickly, often with hands full. The LCN 4040XP with Extra Duty Arm (EDA) is the correct specification for these openings. The EDA adds a forged steel main arm and forearm to the standard 4040XP aluminum arm, preventing the arm-bending deformation that eventually stops a lighter arm from fully closing a door under repeated high-force operation.

For exterior pedestrian entry doors exposed to wind, the 4040XP's backcheck valve should be set to limit the door travel and prevent the arm from being damaged if the door is caught by a gust. The hold-open position on these doors is typically not desired for security reasons: a pedestrian entry door held open allows unauthorized entry to the pedestrian circulation area from the parking level without passing through a controlled point.

In cold climates, specify the LCN 4040XP with Liquid X all-weather hydraulic fluid. Standard closer fluid thickens at low temperature and causes slower closing speeds, higher opening resistance, and in extreme cold, failure to latch. Liquid X maintains more consistent viscosity across a wider temperature range and is the correct specification for exterior parking garage doors in any market with below-freezing winter temperatures. Browse LCN 4040XP EDA door closer parts for parking garage pedestrian entry doors at SecurityParts.com.

Finish Selection for Parking Garage Hardware

Hardware finish selection in a parking garage environment should start from the harshest expected condition, not from the aesthetic preference. For most parking structures in markets with winter road salt use, US32D (satin stainless steel) is the correct specification for locksets, exit device trim, and any hardware directly exposed to moisture or chloride-laden air. Stainless steel does not rely on a plated surface over a steel or zinc base: the corrosion resistance is inherent in the material. A scratch on US32D stainless does not create a corrosion initiation point the way a scratch on US26D (satin chrome over brass) or US26 (bright chrome) does.

For hardware in enclosed interior stairwells with some air circulation but limited direct moisture exposure, US26D (satin chrome over brass) is generally adequate. The brass base provides better inherent corrosion resistance than steel, and the lacquer over chrome surface holds up reasonably well in indirect exposure environments. US26D on enclosed garage stairwell interior hardware is a common specification that provides good value without the cost premium of full stainless throughout.

The finish incompatibility that creates galvanic corrosion in parking garage hardware: When two dissimilar metals are in contact in the presence of moisture, the less noble metal corrodes preferentially. This is galvanic corrosion, and it is relevant to parking garage hardware because stainless steel (US32D) exit device trim mounted on a steel door with moisture between them will cause the steel door to corrode at the mounting points. The solution is to use isolation hardware (nylon washers, non-metallic spacers) between the stainless trim and the steel door where the two materials contact each other in a wet environment. This detail is specified on Von Duprin OUT devices and should be confirmed on any installation where stainless trim is mounted on non-stainless substrate in a corrosive environment.

Parking Garage Hardware Specification Summary

To keep it straightforward: for stairwell exit doors, use Von Duprin 98/99 Series with the OUT option and US32D stainless finish. For stairwells over 4 stories, add fail-safe electrified trim. For lower-traffic stairwells in smaller structures, the Von Duprin 22 Series is a simpler, adequate alternative. For pedestrian entry doors, use the LCN 4040XP EDA with Liquid X fluid in cold climates. For interior stairwell cylindrical locks, use Schlage ND Series in US26D finish with Grade 1 certification. For all exterior hardware, specify US32D stainless on any hardware in direct moisture or salt exposure.

Browse replacement parts for all these products at SecurityParts.com. Contact the team at 845-935-0301 or the SecurityParts.com contact page for parking garage hardware specification support and same-day OEM parts shipping.

Frequently Asked Questions

Why does standard commercial door hardware fail faster in parking garages?

Road salt chlorides tracked in by vehicles, moisture from open sides and condensation, vehicle exhaust creating acidic surface deposits, and wide temperature swings combine to attack standard hardware finishes and corrode base steel. Standard commercial chrome and nickel plated steel hardware shows visible corrosion within two to four years in high-salt parking environments. Hardware specified for these conditions uses corrosion-resistant materials throughout, including internal mechanism components, not just corrosion-resistant surface finishes.

What is the Von Duprin OUT outdoor-rated exit device and when is it specified?

The Von Duprin OUT option modifies the standard 98/99 Series exit device with corrosion-resistant internal components, outdoor-rated materials throughout, and weep holes that drain water entering the mechanism case. It is specified for parking garage stairwell exit doors open to exterior air and moisture, perimeter exit doors, rooftop terrace doors, and any semi-exposed application where the device faces weather or chloride exposure. The Von Duprin 22 Series is a simpler alternative for low-traffic parking garage stairwells in smaller structures.

What are the stairwell reentry hardware requirements for parking garages over 4 stories?

The IBC requires reentry hardware on stairwell doors in buildings over 4 stories above grade, allowing occupants in the stairwell to reenter any floor without a key. In parking garages, fail-safe electrified trim on Von Duprin exit devices is the standard solution: the exit device provides push-bar egress and fire exit hardware listing from the parking floor side, while the fail-safe electrified trim on the stair side unlocks automatically on power loss and allows free reentry from the stairwell side. During after-hours periods, the parking floor entry side can require a credential while the stair side always allows free exit.

Is panic hardware required on all doors in a parking garage?

Parking garages are classified as Group S-2 storage occupancy (open garages) rather than assembly occupancy, so the assembly occupancy panic hardware threshold (50 persons under IBC) does not directly apply based on occupancy type. However, Von Duprin exit devices are widely specified on parking garage stairwell egress doors, perimeter exit doors, and pedestrian entry doors regardless of strict occupant load calculations because they satisfy egress requirements, handle high-cycle traffic, and are the Grade 1 durable solution for commercial egress doors in a demanding environment.

What door closer is best for parking garage pedestrian entry doors?

The LCN 4040XP with Extra Duty Arm (EDA) is the correct specification. The EDA adds a forged steel main arm and forearm that resists the bending deformation generated by high-force operation in a commuter-traffic environment. In cold climates, specify with Liquid X all-weather hydraulic fluid to maintain consistent closing speed at low ambient temperature. Set the backcheck valve to limit door travel and protect the arm from wind damage on exterior-facing entry doors.

What finishes are appropriate for parking garage door hardware?

US32D (satin stainless steel) for any hardware directly exposed to moisture or road salt. Stainless steel provides inherent corrosion resistance throughout the material, not just a plated surface, and a scratch does not create a corrosion initiation point. US26D (satin chrome over brass) is adequate for enclosed interior stairwell hardware with limited direct moisture exposure. Avoid US26 bright chrome and painted steel finishes on any hardware exposed to road salt or direct moisture. When mounting stainless trim on steel doors in wet environments, use isolation hardware between the dissimilar metals to prevent galvanic corrosion.

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LCN 4040XP Installation Template Guide: Which Template to Use and How to Apply It Friday, August 21, 2026

LCN 4040XP surface-mounted door closer. View model diagrams and parts.

Quick Answer

The LCN 4040XP ships with two installation templates. Use the 110-180 degree template for push side and EDA arm configurations. Use the 120 degree template for parallel arm pull side and top jamb pull side configurations. Both templates fold at the door edge, align to a centerline height, and mark all hole locations before drilling. Most top jamb installations also require the 4040XP-18 plate when the top rail is under 3-3/4 inches. If your template is missing, the PDF sheets are downloadable from the manufacturer, or a reusable metal template kit is available from LCN through your distributor.

The LCN 4040XP installation template is the most important piece of paper that ships inside the box. It is also the piece most frequently discarded or lost on the job site. That single mistake is the source of most misaligned holes, stripped screws, and improperly mounted closers in the field.

This guide covers everything a locksmith, facilities technician, or contractor needs before picking up a drill: which of the two 4040XP templates applies to your configuration, how to read each column, how to set handing, how to align and punch through the template correctly for each door type, and what to do when the template is missing. For a full overview of the closer itself, see the LCN door closer parts guide.

Browse the LCN 4040XP series parts catalog for replacement components and the 4040XP model page for interactive diagrams.

Why the LCN 4040XP Uses Two Separate Templates

The 4040XP mounts in three primary configurations, and each places the closer body and arm shoe in a different geometric relationship to the door top edge and door face. A single template cannot locate holes accurately for all three without becoming unreadable in the field.

LCN supplies two separate templates, each optimized for a specific range of arm geometries:

110-180 degree template: for push side mounting with a regular arm, and for EDA (Extra Duty Arm) configurations. Covers opening angles from 110 to 180 degrees.
120 degree template: for parallel arm pull side mounting and top jamb push side mounting. Designed for 120-degree maximum opening applications.

Selecting the wrong template does not produce an obvious error before you drill. The holes appear to be in reasonable positions. The problem only becomes visible after mounting, when the arm geometry is wrong, the closing force is uneven, or the arm shoe cannot reach the correct pre-load angle on the shaft. For help choosing the right closer size and configuration for your opening before installation, see the LCN commercial door closer selection guide.

Which LCN 4040XP Template Applies to Your Configuration

Confirm your arm type and mounting side before touching the template. Use this reference table:

Arm Configuration	Mounting Side	Correct Template	Max Opening
Regular arm (standard)	Push side	110-180 degree template	180 degrees
EDA (Extra Duty Arm)	Push side	110-180 degree template	180 degrees
CUSH arm (cushion stop)	Push side	110-180 degree template	Varies by templated stop
Parallel arm (PA)	Pull side	120 degree template	120 degrees
Regular arm (top jamb)	Push side (top jamb)	120 degree template	120 degrees
Regular arm (pull side)	Pull side	120 degree template	120 degrees

LCN 4040XP EDA and CUSH arm assemblies. View arm assembly diagrams and parts.

Note on CUSH stop points: CUSH arm installations use the 110-180 template, but actual stop points are approximately 5 degrees more than the templated stop. A 180-degree template position yields a stop of approximately 175 degrees. Factor this offset into your planning when matching an existing door stop position.

How to Determine Door Handing Before Using the Template

Both templates have separate columns for left-hand (LH) and right-hand (RH) doors. Using the wrong column positions the closer body incorrectly relative to the arm shaft, which produces wrong arm geometry and inconsistent closing force.

Stand on the pull side of the door (the side without the closer body) and face the door:

Hinges on your left: left-hand (LH) door
Hinges on your right: right-hand (RH) door

Most LCN 4040XP templates label the LH and RH columns with an arrow and a "Hinge Side" marker. Select the matching column before marking any holes. If you are unsure which closer type is correct for your door, the commercial door closers types guide covers mounting side, arm type, and application requirements by closer family.

Reading the LCN 4040XP Template: What Each Element Means

Both templates show the same categories of information arranged in columns by arm type and handing. Understanding each dimension prevents the most common field errors. For a labeled diagram of every component on the 4040XP, see the door closer parts diagram guide.

Closer Body Mounting Holes

These are the holes for the four or five screws that mount the closer body directly to the door face (push side) or door head (top jamb). Their position is shown relative to two reference points: the door top edge and the door face. The standard centerline height for most push side 4040XP installations is 1 inch from the door stop rabbet, measured from the top of the door down.

Arm Shoe Bracket Holes

For push side regular arm and EDA installations, the arm shoe mounts to the door frame on the strike side. The template shows the horizontal backset for the shoe: the distance from the door edge to the center of the shoe bracket holes. This backset changes based on door width and arm configuration. The template prints the backset range so you can confirm the shoe will land on a solid frame face with adequate fastener engagement.

Spring Power Chart

Both templates include a spring power adjustment chart that matches door width to the correct spring power setting (1 through 6). Set spring power before mounting the body. Adjusting it after mounting requires removing the cover, which adds time to every installation. For a full explanation of spring power ranges and ANSI sizing requirements, see the commercial door closer sizing guide.

Step-by-Step: How to Apply the LCN 4040XP Installation Template

Select the correct template. Confirm your arm configuration and mounting side using the table above. Locate the 110-180 degree or 120 degree template.
Set spring power first. Look up the door width on the spring power chart. Adjust the spring power dial on the closer before mounting using the LCN FAST Power Adjust. Easiest to do before the body is in place.
Set the centerline height. Measure from the top of the door down to the closer centerline. For most push side installations, this is 1 inch from the door stop rabbet on the pull side face. Mark a horizontal pencil line across the full door face.
Fold or peel and align the template. The paper template folds along the door edge line. Align the fold with the door edge and match the top of the template to the door top edge. The centerline mark on the template should align with your pencil line.
Tape the template securely. Apply masking tape at two or three points. Do not rely on the fold alone. Movement during marking shifts hole positions.
Center punch all hole locations. Use a spring-loaded center punch through the template at every marked hole. Do not skip this step on hollow metal doors, where a drill bit without a starter dimple walks across the surface.
Remove the template, then drill. Remove the template before drilling. Drill 1/8 inch pilot holes at all closer body locations for SRT fasteners. For through-bolted wood doors, drill full-diameter clearance holes.

For the complete installation walkthrough including arm attachment, valve adjustment, and ADA compliance checks after mounting, see the how to install a door closer on a commercial door guide.

Template Application by Door Type

The template procedure is the same regardless of door material, but the drilling technique changes based on the substrate.

Hollow Metal Doors

Always use a center punch before drilling. Without a starter dimple, the drill bit walks on the metal surface and the hole lands off-center. Drill a 1/8 inch pilot hole at each location. The SRT screws tap their own threads as they are driven in. Do not over-torque the screws. The hollow steel facing is typically 16 to 18 gauge and the threads strip quickly if driven past resistance.

Wood Doors

Wood doors accept SRT screws directly, but pilot holes still prevent splitting near the door top edge where grain runs longitudinally. For heavy wood doors or through-bolted installations with machine screws and sex bolts, drill full-diameter clearance holes at the template locations.

Aluminum Storefront Doors

Aluminum requires the same center punch step as hollow metal. The material is softer and a bit will walk even more easily without a starter dimple. Many aluminum door manufacturers require through-bolted mounting with reinforcement plates behind the door rail. Confirm this with the door specification before using SRT screws.

Top Jamb Installation: Special Requirements Before You Template

Top jamb mounting places the closer body on the door head with the arm shoe on the door face near the top edge. Before templating any top jamb installation, check one critical dimension.

Measure the frame face (top rail depth). The exposed frame face between the door face and the wall must be at least 3-1/2 inches for a flush header or single-rabbet frame. If the top rail is less than 3-3/4 inches deep, the closer body will overhang the frame face and cannot mount securely.

For frames with insufficient depth, the LCN 4040XP-18 drop plate is required. This plate extends the mounting surface and provides the additional frame face needed. Order the plate before the installation date. The template for top jamb installations notes this requirement, but it is easy to miss when reading quickly on the job. On fire-rated doors, top jamb installations must also comply with the closer's UL listing requirements. The fire door closer adjustment guide covers the post-installation checks that apply.

EDA and CUSH Arm Templates: What Changes

The EDA and CUSH arm configurations both use the 110-180 degree template, but each has installation details that differ from a standard regular arm push side job.

LCN 4040XP arm assembly configurations. View arm assembly diagrams and parts.

EDA (Extra Duty Arm)

The EDA arm uses the same 110-180 degree template as the standard regular arm push side installation. EDA and CUSH arm closers include the 4040XP-201 fifth hole spacer to support the shoe at an additional fastener location. The template marks the fifth hole position. Make sure to punch and drill this hole. It is easy to miss when the standard four-hole pattern is habitual.

CUSH Arm (Cushion Stop)

The CUSH arm also uses the 110-180 degree template, but stop points differ from the template labels. A door templated at 90 degrees will actually stop at approximately 95 degrees with the CUSH arm. A 180-degree templated position yields a stop of approximately 175 degrees. Build this offset into your planning if you are matching an existing door stop position. For part-by-part identification of every component in these arm assemblies, see the LCN door closer parts guide.

What to Do When the LCN 4040XP Template Is Missing

The paper template gets lost, discarded, or damaged on busy job sites. When it is missing, you have three options:

Option 1: Download the PDF Template Sheets

Allegion publishes each LCN 4040XP template as a downloadable PDF through their resource portal. The templates must be printed at 100 percent scale on standard 8.5 x 11 inch paper. Do not print to "fit page" or the dimensions will be wrong and every hole location will be off.

Option 2: Source the LCN 4040XP Metal Template Kit

The LCN 4040XP metal template kit is a reusable machined aluminum drilling guide that permanently replaces the paper template. It is the professional choice for crews that install multiple 4040XP closers regularly.

4040XP-107: metal template for push side EDA arm configurations
4040XP-107CUSH: metal template for CUSH arm configurations

The metal kit eliminates template shift during center punching, does not tear or degrade, and requires no tape. On hollow metal doors with multiple closers being installed in the same session, it dramatically reduces setup time per door. Call Security Parts at 845-935-0301 for help identifying the correct kit for your configuration.

Option 3: Use Known Hole Dimensions Manually

If neither option is immediately available, locate the published installation instruction sheets for your specific configuration. The hole positions are shown as dimensioned drawings in each sheet. Transfer the dimensions manually using a tape measure and a square, then mark with a center punch before drilling. This approach is slower and carries more risk of measurement error.

For parts sourcing questions, call Security Parts at 845-935-0301 or visit the contact page.

Spring Power Adjustment After Mounting

The LCN 4040XP uses the FAST Power Adjust system, which allows spring power changes without tools and without removing the cover. Locate the adjustment slot on the back of the closer near the pivot end. Settings run from 1 (lightest) to 6 (strongest).

Door Width	Spring Power Setting
30 inches and under	1 or 2
30 to 36 inches	2 or 3
36 to 42 inches	3 or 4
42 to 48 inches	4 or 5
48 to 54 inches	5 or 6

For ADA-compliant openings, the maximum opening force is 5 pounds on push side doors. Verify the opening force with a push-pull gauge after setting spring power. For a full walkthrough of sweep speed, latch speed, and backcheck adjustment after installation, see the commercial door closer adjustment guide.

LCN 4040XP Parts and Resources at Security Parts

LCN 4000 Series surface-mounted door closers. Browse all door closer parts.

Security Parts stocks LCN 4040XP replacement parts with same-day shipping on stocked items. The LCN 4040XP model page includes interactive assembly diagrams with labeled component positions. The LCN 4040XP series parts catalog lists every stocked part by category. Browse the full door closers parts catalog for LCN and other manufacturer components.

For pre-order compatibility support, call 845-935-0301 or contact the team through the contact page.

Related LCN Guides

About the Author

This guide was written by the Security Parts team, a commercial door hardware parts specialist serving locksmiths, facility managers, contractors, and service technicians since 2001. Security Parts stocks OEM and aftermarket replacement components for LCN, Von Duprin, Schlage, Falcon, and other leading commercial hardware manufacturers, with same-day shipping on stocked items and pre-order parts identification support at 845-935-0301.

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Von Duprin 98/99 Series Exit Device Parts Guide: Components, Series ID, Trim and Ordering Reference Thursday, August 20, 2026

The Von Duprin 98 and 99 Series are the benchmark Grade 1 commercial exit devices. The 98 has a smooth mechanism case; the 99 has a grooved mechanism case housing a fluid dampener that controls push pad return speed. Both carry identical UL 305, UL 10C, and ANSI A156.3 Grade 1 certification. The grooved case on the 99 is functional, not decorative. The 990-series trim stanchions must match the 98/99 center case mounting pattern; mixing series trims does not work. The -F suffix designates fire exit hardware and prohibits mechanical dogging. QEL is the quiet motor alternative to EL solenoid latch retraction. The 996L lever trim is the current replacement for discontinued 992L and 994L models. Parts compatibility extends across the full 98/99 production history, including devices nearly 40 years old.

The Von Duprin 99 replaced the 88 Series as the North American commercial exit device standard in the early 2000s. Its flat push pad actuator replaced the crossbar profile of the 88 and 33A and became the default specification for schools, hospitals, office towers, government buildings, and institutional facilities nationwide. The 98/99 modular design means that parts ordered today are compatible with devices installed decades ago, which is why these are the most actively ordered exit device replacement parts in the commercial hardware market.

Browse Von Duprin 98/99 Series OEM replacement parts at Security Parts: Von Duprin 98/99 Series exit device parts and assemblies, complete Von Duprin parts catalog including all series, Von Duprin compatible electric strike parts, Von Duprin exit alarm parts, and the complete Allegion OEM exit device catalog.

98 vs 99: How to Identify the Series by the Mechanism Case

The first thing to identify on any Von Duprin exit device is the series. On the 98/99, the identification is immediate and visual: look at the mechanism case (the metal housing that contains the device's operating mechanism, mounted on the door face).

Von Duprin 98 Series

Smooth mechanism case; no fluid dampener

Case exteriorSmooth flat surface on mechanism case

Fluid dampenerNo. Push pad returns immediately to rest after each operation.

UL 305Listed (panic hardware)

UL 10C (-F)Listed for fire exit hardware (with -F suffix)

ANSI Grade 1A156.3 Grade 1 certified

Trim compat.990, 996L, 376, 696, 697, 252 series trim

FinishesUS3, US3A, US4, US4A, US10, US15, US26, US26D, US28, 313, 315, 643E, US32D (98 only adds US15/US32D)

Von Duprin 99 Series

Grooved mechanism case; fluid dampener inside

Case exteriorGrooved/channeled surface on mechanism case (functional, not decorative)

Fluid dampenerYes. The groove marks where the dampener assembly is housed. Push pad returns at a controlled, quiet rate.

UL 305Listed (panic hardware)

UL 10C (-F)Listed for fire exit hardware (with -F suffix)

ANSI Grade 1A156.3 Grade 1 certified

Trim compat.990, 996L, 376, 696, 697, 252 series trim (same as 98)

FinishesUS3, US3A, US4, US4A, US10, US26, US26D, US26D-AM, US28, 313, 315, 643E

The grooved case is functional, not decorative. The dampener is not field-swappable: The 99 Series groove is exactly where the fluid dampener assembly is housed inside the mechanism case. This is not an aesthetic design choice. On a 98 without a dampener, the push pad springs back to rest position immediately after each depression. In high-cycle applications (schools, hospitals, government buildings), immediate spring-back can be noisy and can be perceived as harsh operation. The 99's dampener produces a smooth, controlled return. Critically: the dampener assembly inside the 99 is not a field-installable upgrade for a 98. The case itself is different. If dampened operation is needed on an existing 98 installation, the device body must be replaced with a 99 device body.

Von Duprin 98/99 Device Types

Rim Device

Standard single door; most common type

Model prefix: 98 / 99 (without rod suffix)

Handing: Non-handed (except when SD, -2, or SS options are specified)

Latch engagement: Rim latch bolt engages a rim strike (299 or 310 series) mounted on the door frame

Door prep: Covers standard 86 or 161 cutout on hollow metal doors

Stile: Minimum 4-3/4 inch (121mm) door stile width

Surface Vertical Rod (SVR)

Double door pairs; rods visible on door surface

Model prefix: 9827 / 9927

Handing: Non-handed

Latch engagement: Top rod engages head frame; bottom rod engages door bottom rail or threshold

Use: Double door openings where no astragal is present

Door prep: Covers 86 or 161 cutouts

Concealed Vertical Rod (CVR)

Double door pairs; rods hidden inside door

Model prefix: 9847/9848 / 9947/9948

Handing: Handed (specify handing when ordering)

Latch engagement: Concealed rods run inside the door body to top and bottom latch points

Door prep: Requires 161 cutout inside door for mechanism

Use: When surface rods are aesthetically unacceptable; wood or aluminum doors

Mortise Lock (9875/9975)

Mortise latch inside door body

Model prefix: 9875 (smooth) / 9975 (grooved/dampened)

Handing: Non-handed

Latch engagement: Mortise latch case inside door body engages strike in frame

Door prep: Requires 86 cutout in door

Stile: Minimum 4-3/4 inch (121mm)

Von Duprin 990 Trim Family: Models, Functions, and Stanchion Compatibility

The trim on a Von Duprin exit device is the outside escutcheon plate and hardware that mounts on the exterior (non-egress) side of the door, providing the means for authorized entry. The 990 trim family is the standard trim for 98/99 Series devices. All 990 trim plates measure 3 inches wide by 14-3/16 inches tall and have integral stanchions on the back that align with the center case mounting screws of the 98/99 device.

Trim Model	ANSI Function	Outside Operation	Notes
990DT / EO	F01 / F02	Pull handle (exit only); no key	No outside access; egress only. 990DT has pull; EO has no outside trim.
990NL	F03	Key retracts latchbolt for outside entry	Night latch. Rim cylinder required (not included). Field selectable from DT/NL as shipped.
990TP	F04	Thumbpiece (thumbturn) retracts latchbolt	Passage-style outside access; no key required. Remove NL drive screw to convert from NL.
996L / 996L-R&V	F05/F07	Lever; key locks/unlocks lever for outside entry	Replaces discontinued 992L and 994L. Handed but field-reversible. 2-3/4" wide x 10-3/4" high escutcheon plate. Cylinder not included.
376 Series	Various	Narrow stile trim for 33A/35A; not for 98/99 standard	Do NOT use with standard wide-stile 98/99 devices. Different stanchion pattern.

Trim stanchion compatibility error that generates field rework: The 990 trim stanchions align specifically with the 98/99 Series center case mounting screw pattern. Von Duprin uses different center case spacing on different series. A locksmith who orders 990 trim for a 33A/35A device gets a trim plate where the stanchions do not align with the device case screw holes. Conversely, 376-series narrow stile trim ordered for a 98/99 wide stile device will not align. Always confirm the device series (98/99 vs 33A vs 22) before ordering trim. If the device model number is not visible, the center case width tells you the series: the 98/99 uses a wide case; the 33A/35A uses a narrow stile case.

The 996L: Current Replacement for Discontinued 992L and 994L Trim

The Von Duprin 996L is the current production lever trim for 98/99 Series devices. It replaces the discontinued 992L and 994L lever trim models. If you have a device with 992L or 994L trim that needs replacement, the 996L is the correct ordering part. The 996L escutcheon plate is 2-3/4 inches wide by 10-3/4 inches high and projects 27/32 inches from the door face. The lever handle projection is 2-7/8 inches. The cylinder is not included and must be ordered separately. Browse Von Duprin 996L lever trim replacement parts at Security Parts.

The Fire Rating Suffix: -F, Dogging Prohibition, and QEL Alternative

Adding -F to any Von Duprin 98/99 Series device designation produces the fire exit hardware version: 99-F, 98-F, 9927-F (SVR), and so on. The -F designation means the device has been independently tested and listed to UL 10C (Positive Pressure Fire Tests of Door Assemblies) in addition to the standard UL 305 panic hardware listing. Fire exit hardware bears the designation "Fire Exit Hardware" on its label. Standard panic hardware (98 without -F) may only be labeled "Panic Hardware."

The functional consequence of -F that most specifiers and locksmiths need to understand: the -F version has no mechanical dogging capability. NFPA 80 requires that fire doors positively latch when closed. Mechanical dogging holds the latch bolt retracted, preventing positive latching. If a fire-rated exit device is mechanically dogged and the door accidentally closes during a fire event, the door cannot positively latch. For this reason, Von Duprin fire exit hardware (-F) is manufactured without a hex dogging socket or cylinder dogging option.

The alternative for access control on fire-rated openings is QEL (Quiet Electric Latch Retraction), which holds the latch retracted only when powered. On fire alarm activation or power loss, QEL releases to positive latching, restoring fire door compliance. Browse Von Duprin 99-F fire exit hardware and QEL parts at Security Parts.

Von Duprin 98/99 Suffix Options Reference

QEL Quiet Electric Latch Retraction

Motor retracts latch bolt quietly on credential signal. Preferred over EL for noise-sensitive environments. Compatible with fire-rated (-F) devices. QEL releases to positive latching on fire alarm or power loss.

EL Electric Latch Retraction

Continuous-duty solenoid retracts latch bolt on signal. Alternative to mechanical dogging for access control. Draws 0.22A. Compatible with fire-rated devices. Less quiet than QEL.

ESL Emergency Secure Lockdown

Interrupts power to QEL motor to extend latch bolt and lock outside trim. Inside push bar always free. Allows lockdown from inside the room or from access control system. Used in schools and large classrooms.

ALK Alarm Exit Kit

Unauthorized opening triggers 85-decibel horn. Key arms or disarms alarm. Non-relatch alarm: sounds until staff keys device. Used in retail and institutional secondary exits to deter unauthorized use.

CD Cylinder Dogging

Replaces hex key dogging. Uses a 1-1/4 inch mortise cylinder with inverted cam to dog the device. Allows key-controlled dogging where hex keys are not tracked. Not available on -F fire exit hardware.

CDSI / HDSI Cylinder/Hex Dogging Security Indicator

Provides at-a-glance visual indicator of whether device is currently dogged (latch held retracted) or secured. Critical in academic and government buildings where end-of-day door status must be visually confirmed without operating each device.

RX Pushpad Monitor Switch

SPDT microswitch signals the access control panel when the push bar is operated. Provides exit event audit trail for compliance. Can suppress door-forced-open alarm when push bar generates an exit event without outside credential.

LX Latchbolt Monitor Switch

Signals whether the latch bolt is extended (door latched) or retracted. Note: on 9849/9949 CVR devices, LX monitors trim input or electric dogging condition rather than latch bolt position directly.

AX Accessible (5 lb max force)

UL certified to meet the 5-pound maximum operating force requirement of the 2010 ADA and 2013 California Building Code. Exceeds ANSI/BHMA requirements. Required on accessible egress route doors.

PN Pneumatic Latch Retraction

For areas where electrical devices are prohibited (some healthcare, some government). Special linkage for mechanical or pneumatic dogging. Pneumatic air signal retracts latch bolt instead of solenoid or motor.

Commonly Replaced Von Duprin 98/99 Series Parts

Latch Return Spring (Latch Spring Kit)
The most frequently replaced internal component. Controls latch bolt return to extended position after the push bar is released. When worn or broken, the latch does not return fully, preventing the door from latching. OEM latch return spring kits are available for rim, SVR, CVR, and mortise device types. Order by device type (not interchangeable between rim and vertical rod configurations). Browse Von Duprin 98/99 latch return spring kits at Security Parts.
Push Bar / Push Pad Assembly
The push bar pivot points and push pad assembly are wear items in high-cycle institutional applications. Loose or wobbling push bar operation after tightening fasteners indicates worn pivot points requiring push bar assembly replacement. The 98/99 modular design allows push bar replacement without removing the entire device from the door.
990 Trim Plate and 996L Lever Trim
Trim plates are replaced for finish damage, lever wear, or function changes. The 996L is the current production replacement for the discontinued 992L and 994L. Cylinder not included with any 990NL or 996L trim order. Browse Von Duprin 990 and 996L trim replacement parts.
Rim Cylinder
The rim cylinder in the 990NL trim is a standard 1-1/8 inch format rim cylinder. It is ordered and keyed separately from the trim plate. Specify keyway and keying requirements (master key, keyed alike, keyed different) when ordering. Browse Von Duprin compatible rim cylinder replacement parts.
Dogging Shaft and Adaptor Assembly
The dogging shaft (for hex key dogging) and dogging adaptor are field-replaceable components on non-fire devices. The shaft accepts a 5/32 inch dogging key. The current dogging shaft has been the standard since 1998; pre-1998 devices use an older part number. Identify the device production date before ordering dogging components. Browse Von Duprin dogging shaft and adaptor replacement parts.

The 98/99 parts compatibility that extends nearly 40 years: The Von Duprin 99 has been in continuous production essentially unchanged in its platform since the late 1970s. Current production latch return springs, push bar assemblies, and trim components are compatible with devices installed in the 1990s and even the 1980s. This multi-decade backwards compatibility is a deliberate Von Duprin design commitment that makes the 98/99 the most economically practical exit device to maintain in aging institutional buildings. When a maintenance manager at a 1995 school building or a 2001 government facility needs to repair a Von Duprin 99, today's OEM replacement parts from SecurityParts.com fit the device installed 30 years ago.

Contact SecurityParts.com at 845-935-0301 or the contact page for Von Duprin exit device parts identification and same-day OEM shipping support.

Why Choose Security Parts for Von Duprin 98/99 Parts

Grooved case fluid dampener functional explanation, trim stanchion mismatch warning, -F dogging prohibition with QEL alternative, 996L replaces 992L and 994L, 40-year parts compatibility, and same-day OEM shipping.

Grooved Case is Functional

We document that the 99 Series groove is not cosmetic: it marks the location of the fluid dampener assembly inside the case. And the dampener is not field-installable on a 98: if dampened operation is needed on a 98 installation, the device body must be replaced. No competitor documents this at the parts ordering level.

Trim Stanchion Mismatch Warning

We document that the 990 trim stanchions align specifically with the 98/99 Series center case mounting pattern, and that 33A trim (376 series), 22 Series trim, and 98/99 trim are not interchangeable. Field rework from wrong series trim is the most preventable waste in exit device service calls.

40-Year Parts Compatibility

We document that current OEM latch return springs, push bar assemblies, and trim components are compatible with Von Duprin 99 devices installed since the late 1970s. Facilities maintaining 1990s or early 2000s institutional buildings can order today's OEM parts from SecurityParts.com for 30-year-old devices.

Same-Day OEM Shipping

Von Duprin 98/99 OEM parts ship same day from US warehouses. Call 845-935-0301 or the contact page for parts ID support.

What Makes Security Parts Different for Von Duprin 98/99 Parts

We document that the 99 Series grooved mechanism case is not a cosmetic design feature: the groove marks the functional location of the fluid dampener assembly that controls push pad return speed. The 98 does not have a dampener, and the dampener cannot be field-installed in a 98 case. Replacing a 98 with a 99 requires a full device body replacement.
We document the 990 trim stanchion alignment requirement and the specific incompatibility between 990 trim (for 98/99 Series) and 376 trim (for 33A/35A narrow stile Series). Wrong-series trim ordered for the wrong device generates field returns and rework. Confirming device series before ordering trim prevents this.
We document the -F fire exit hardware dogging prohibition: NFPA 80 requires positive latching on fire doors, and mechanical dogging prevents positive latching. The -F device has no mechanical dogging. QEL (Quiet Electric Latch Retraction) is the code-compliant access control alternative on fire-rated openings because it releases to positive latching on fire alarm or power loss.
We document that the 996L lever trim is the current OEM replacement for discontinued 992L and 994L models, and that the 996L cylinder must be ordered separately. Ordering a 996L without also ordering a compatible rim cylinder produces a trim plate that cannot provide keyed entry.
We carry Von Duprin 98/99 OEM exit device parts, complete Von Duprin catalog parts, exit alarm parts, and compatible electric strike parts as an authorized Allegion OEM parts distributor.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience. Parts compatibility confirmed across the full 98/99 production history.

Frequently Asked Questions About Von Duprin 98/99 Series Exit Device Parts

What is the difference between Von Duprin 98 and 99 Series exit devices?

The 98 has a smooth mechanism case; the 99 has a grooved mechanism case housing a fluid dampener that controls push pad return speed. The groove is functional, not decorative. The 98 push pad returns immediately to rest after each operation. The 99 push pad returns smoothly at a controlled rate. Both have identical UL 305 panic hardware, UL 10C fire exit hardware, and ANSI A156.3 Grade 1 certification. The fluid dampener is the only functional difference. The dampener cannot be field-installed in a 98 case: if dampened operation is needed, the device body must be replaced with a 99.

What device types are available in the Von Duprin 98/99 Series?

Rim (most common; non-handed; rim latch bolt engages frame-mounted rim strike), SVR 9827/9927 (surface vertical rod; surface rods visible on door; used for double door pairs), CVR 9847/9948 (concealed vertical rod; rods hidden inside door; requires 161 door preparation; handed), mortise 9875/9975 (mortise latch case inside door body; requires 86 cutout; non-handed), and double egress (special rim for double egress pairs where both leaves swing in opposite directions).

What is the 990 trim and how do the stanchions align with the exit device?

The 990 trim family (990DT, 990NL, 990TP) are the standard outside trim options for 98/99 Series devices. Each trim plate is 3 inches wide by 14-3/16 inches tall with integral stanchions on the back that align with the 98/99 center case mounting screw locations. The stanchion pattern is specific to the 98/99 Series: 990 trim does not fit 33A, 22 Series, or other Von Duprin devices. Confirm the device series before ordering trim. The 996L lever trim replaces the discontinued 992L and 994L; cylinder is ordered separately.

What does the -F suffix mean on a Von Duprin exit device and what does it change?

The -F suffix designates fire exit hardware: the device is listed to both UL 305 (panic hardware) and UL 10C (fire exit hardware, positive pressure tested). The critical change: -F devices have no mechanical dogging because NFPA 80 requires fire doors to positively latch and mechanical dogging prevents positive latching. QEL (Quiet Electric Latch Retraction) is the code-compliant alternative for access control on fire-rated openings: QEL releases to positive latching on fire alarm or power loss, maintaining fire door compliance.

What is the difference between QEL and EL on Von Duprin exit devices?

Both QEL and EL allow the latch bolt to be retracted remotely by an access control system, converting the door to push/pull entry operation without a key. EL uses a standard continuous-duty solenoid (0.22A draw). QEL uses a motorized mechanism that operates more quietly, preferred in libraries, courtrooms, and quiet offices. Both are compatible with fire-rated (-F) devices. Both release to positive latching on fire alarm or power loss. QEL is also used with ESL (Emergency Secure Lockdown): interrupting QEL power extends the latch bolt to lock the outside trim for active threat response.

What Von Duprin 98/99 parts are most commonly replaced and how do I order them?

Most commonly replaced: latch return spring (controls latch bolt return; available as OEM kits by device type: rim, SVR, CVR, mortise), push bar assembly (pivot wear after high-cycle use), 990NL and 996L trim (finish damage or function changes; cylinder ordered separately), rim cylinders for 990NL trim (standard 1-1/8 inch rim format; specify keyway and keying), and dogging shaft assembly (pre-1998 and post-1998 shaft are different part numbers; identify device production date before ordering). Call SecurityParts.com at 845-935-0301 with the device model, trim model, and finish for same-day parts identification and shipping.

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Von Duprin 22 Series Exit Device Parts: Rim, 2227 SVR, Dogging and Ordering Guide Thursday, August 20, 2026

Von Duprin 22 Series rim exit device. Browse parts and diagrams.

Quick Answer

The Von Duprin 22 Series is a Grade 1 rim exit device designed for medium-traffic commercial openings. The 2227 is the surface vertical rod (SVR) version of the same family. The two devices share many dogging and baseplate components but use different center cases: part 109012 for the 22 rim and part 109358 for the 2227 SVR. End cap failure (900981) is the most common fault on both configurations. Devices manufactured before July 1997 use different dogging parts. This guide covers how to identify your configuration, which parts wear out first, and how to order correctly every time.

22 Series: rim configuration, single-point latching at the strike
2227 Series: surface vertical rod (SVR), three-point engagement at header, door face, and floor
Center case: 109012 (22 rim) vs 109358 (2227 SVR): not interchangeable
End cap kit: 900981: most commonly replaced part on both configurations
Dogging: hex key is factory default; cylinder dogging is an available option
Pre-1997 devices use a different dogging shaft. Call before ordering dogging parts

What the Von Duprin 22 Series Is and Where You Find It

The Von Duprin 22 Series is an ANSI/BHMA A156.3 Grade 1 panic exit device designed for medium-traffic commercial and multi-family openings. It carries UL listing for both panic and fire exit hardware and fits door stiles as narrow as 3-13/16 inches.

You find it most often on back-of-house retail doors, employee entrances, parking garage stairwells, multi-family corridor exits, and clinic back doors. It is the cost-effective Grade 1 specification for applications that do not require the institutional depth of the 98/99 Series but still need certified egress hardware.

The 22 Series ships in two primary configurations:

22 Rim: mounts on the door face and latches into a single rim strike on the frame
2227 SVR (Surface Vertical Rod): adds top and bottom rods that engage strikes at the header and floor, covering double doors without a center post

Both configurations are non-handed, Grade 1 certified, and compatible with the same trim family. Fire-rated variants add an "F" suffix: 22-F for the rim device and 2227-F for the SVR device. Browse the complete parts catalog and interactive diagrams on the 22 Series parts page.

How to Identify Your 22 Series Configuration Before Ordering Parts

Getting the right part starts with knowing exactly which version of the 22 Series is installed. There are four things to confirm before placing any order.

Von Duprin 22 Series device configuration. View interactive diagrams.

1. Rim or Surface Vertical Rod

Look at the door. If the exit device mounts flat on the door face and connects to a single strike on the frame at the latch side, it is a 22 rim device. If you see metal rods running vertically from the device body up to the header and down to the floor, with strikes at the top and bottom of the door frame, it is a 2227 SVR device.

This identification step matters before ordering a center case. The 22 rim center case (109012) and the 2227 SVR center case (109358) look similar but are not interchangeable. Ordering the wrong one is the most common mistake on this device.

2. Panic or Fire Rated

Fire-rated devices are marked with an "F" suffix in the model number (22-F or 2227-F). On fire-rated devices, the hex key dogging is removed and replaced with a fire-rated latch that cannot be held open. Do not install a dogging assembly on a fire-rated device. It will compromise the fire rating and cause the device to fail NFPA 80 annual inspection.

3. Manufacturing Date

Find the device label on the mechanism body, typically near the model number. Devices manufactured before July 1997 use an older style dogging shaft approximately 1.5 inches long with a 0.5-inch diameter. Current devices use the updated hex dogging shaft (090040). If your device predates July 1997, call Security Parts at 845-935-0301 before ordering dogging components.

4. Hex Dogging or Cylinder Dogging

The 22 Series ships with hex key dogging as standard. Look at the hinge-side end behind the cover plate. A small hex socket means hex key dogging. A mortise-cylinder keyway means cylinder dogging, which is a factory option or field conversion that allows a mortise cylinder to hold the latch open instead of requiring an Allen key.

Von Duprin 22 Series Part Categories Explained

Once you know your configuration, the parts on this device break down into four functional groups. Understanding what each group does helps you diagnose the fault and order the right part the first time.

Dogging Assembly Parts

The dogging assembly holds the latch in the retracted position so the door swings freely without triggering the panic release on every push. It sits on the hinge side of the device behind the cover plate. The assembly consists of five main components, all stocked individually or in packs.

Von Duprin Hex Dogging Shaft (090040), pack of 2. View product.

Part	Part Number	Notes
Hex Dogging Shaft	Hex Dogging Shaft (090040)	Pack of 2. Current spec since July 1997. Shared with 33A, 35A, 98, and 99 Series
Dogging Adaptor	Dogging Adaptor (090043)	Pack of 2. The female receptacle that holds the shaft in place
Dogging Adaptor Spring	Dogging Adaptor Spring (090042)	Pack of 2. Locks the dogging adaptor into the mounting bracket
Dogging Spring	Dogging Spring (090041)	Pack of 2. Returns the dogging shaft to the ready position
Dogging Hook	Dogging Hook (090044)	Pack of 2. Engages the shaft to hold the latch retracted
Hex Dog Key, Pack of 10	Hex Dog Key Pack of 10 (090085)	5/32-inch hex. Use the longer key to reach fully into the device
Hex Dog Key, Pack of 2	Hex Dog Key Pack of 2 (090005)	5/32-inch hex, pack of 2

Center Case and Cover Plate

The center case is the housing that contains the panic mechanism. Replace it when the latch no longer retracts smoothly or when internal mechanism failure is confirmed.

There are two separate center cases for the 22 Series. Ordering the wrong one is a common and expensive mistake:

22 Rim center case (part 109012): for the standard rim device
2227 SVR center case (part 109358): for the surface vertical rod device

The Cover Plate Anti-Rattle Spring (090036) is worth replacing whenever the cover plate is removed. It is a low-cost part that stops the plate from rattling and is the correct time to service it.

End Cap and Mechanism Housing

End cap failure is the single most common fault on the 22 Series. The plastic end cap (part 900981) sits at the hinge-side end of the device and holds the dogging cover plate in its channel. When the end cap cracks or breaks, the cover plate slides out and falls off, exposing the dogging assembly.

Von Duprin End Cap Kit (900981): the most common replacement part on the 22 Series. View product.

The correct fix is to replace the End Cap Kit (900981), which includes both the end cap and the steel mounting bracket. Since October 2014, Von Duprin discontinued selling the end cap alone and ships only the complete kit.

Two additional parts are serviced in the same area:

NL Drive Screw Pack of 10 (090074): for Night Latch function hardware at the end cap side
Pine Tree Clip Pack of 10 (090099): used on 360-series trim and commonly serviced at the same time as end cap work

Baseplate Assembly Parts

The baseplate is the mounting plate that attaches the exit device to the door face. Baseplate components take direct wear on every push-bar activation and are among the most commonly replaced parts on high-use doors.

Von Duprin 22 rim exit device baseplate assembly. View full diagram and parts list.

Part	Part Number	Notes
Baseplate Screw	Baseplate Screw Pack of 10 (090037)	Pack of 10
Baseplate Bumper	Baseplate Bumper Pack of 4 (090038)	Pack of 4. Rubber buffers between device body and door face
Baseplate Return Spring	Baseplate Return Spring (090039)	Pack of 10
Shock Absorber	Shock Absorber (050491)	Cushions push bar impact on activation
Control Link Pin Kit	Control Link Pin Kit (050529)	Full kit with retaining ring
Control Link Pin (bulk)	Control Link Pin Pack of 10 (090031)	Pack of 10
Retaining Ring	Retaining Ring Pack of 10 (090107)	Pack of 10
Latchbolt Pin	Latchbolt Pin Pack of 10 (090079)	Pack of 10

Parts Specific to the 2227 Surface Vertical Rod Configuration

The 2227 SVR adds top and bottom vertical rods that run inside the door to engage strikes at the header and floor. These components require their own replacement hardware distinct from the rim device.

SVR Retrofit and Vertical Rod Hardware

If you have an older 2227 with the original rod guide system, the QM SVR Device Retrofit Kit is the key order for upgrading to current-specification SVR components. It replaces the plastic rod guide caps and springs with a modern assembly that adds rigidity and eliminates the failure-prone original hardware.

Von Duprin QM SVR Device Retrofit Kit (47263418). View product.

Order the QM SVR Device Retrofit Kit (47263418) when the SVR mechanism is intact but the rod and latch hardware need full replacement. View the 2227 SVR interactive parts diagrams on the Von Duprin 22 model page.

Fire Latch Strike Kit for 22-F and 2227-F

Fire-rated configurations use a latch that cannot be held open. The LBR Fire Latch Strike Kit (050171-32) is the correct replacement for the fire-rated latch assembly on 22-F and 2227-F devices.

Von Duprin 22-F rim fire exit device diagram. View diagrams and parts.

Do not install a standard panic latch or dogging assembly in a fire-rated device. It will fail fire door inspection under NFPA 80 and may void the device's UL listing. For fire-rated baseplate assembly diagrams and parts, see the 22-F fire device baseplate assembly page.

Electric Options for the Von Duprin 22 Series

The 22 Series supports a range of electric upgrades. These are the electric parts stocked at Security Parts for this series.

Von Duprin 22 Series QEL (Quiet Electric Latch Retraction) option. View device diagrams.

Option	Part Number	Function
EL Cable Connector (6 ft)	EL Cable Connector (110388)	Electric latch retraction power cable and connector
RX-2 Switch Kit	RX-2 Switch Kit (050270)	Request to exit switch, signals access control when push bar is activated
RX-AUX Switch Kit	RX-AUX Switch Kit (050271)	Auxiliary RX switch for additional monitoring point
RX-LC (Low Current) Switch Kit	RX-LC Low Current Switch Kit (050281)	Low-current RX for systems with reduced signal current requirements
WP-RX-AUX Switch Assembly	WP-RX-AUX Switch Assembly (051881)	Weatherproof RX auxiliary switch for exterior or high-moisture applications
CD/SS Cylinder Lock Nut Package	Cylinder Lock Nut Package (050526)	For cylinder dogging and SS function options

For guidance on selecting between QEL and MEL electric latch retraction on Von Duprin exit devices, see the QEL vs MEL comparison guide.

Von Duprin 22 Series Exit Alarm Kit Components

The Von Duprin ALK (Exit Alarm Kit) converts a 22 or 2227 device into an alarmed exit device. When the push bar is activated, an 85-decibel alarm sounds. It runs on a standard 9-volt battery and is controlled by a mortise cylinder (sold separately). Security Parts stocks the individual components for servicing an existing ALK installation:

Alarm Kit Battery (990637): replacement 9-volt battery for the ALK assembly
Alarm Kit Retainer Nut (969354): secures the cylinder collar in the alarm assembly
Alarm Kit Disarming Label (969350): required door-side instruction label for NFPA and IBC compliance on alarmed egress doors

Cross-Series Part Compatibility: What the 22 Series Shares With Other Von Duprin Devices

Several components on the 22 Series are shared with other Von Duprin exit devices. Knowing this helps when servicing a facility with multiple series installed.

Parts shared across the 22, 33A, 35A, 98, and 99 Series:

Hex dogging shaft (090040)
Dogging adaptor (090043)
Dogging adaptor spring (090042)
Dogging spring (090041)
Dogging hook (090044)
Baseplate screw (090037)
Baseplate bumper (090038)
Retaining ring (090107)

Parts that are series-specific and cannot be substituted:

22 rim center case (109012): do not substitute with 98/99 center cases
2227 SVR center case (109358): distinct from all other series
22 Series push bar retrofit kit (PBKIT 22): specific to this device
22 Series cover plate: 3-foot and 4-foot versions. Always specify door size when ordering

For a broader view of how the 22 Series fits within the full Von Duprin lineup, see the Von Duprin Series Guide.

How to Order Von Duprin 22 Series Parts from Security Parts

Security Parts stocks the full range of 22 Series replacement parts with same-day shipping on stocked items. Browse the complete catalog on the 22 Series parts page, where every item includes an interactive diagram with part numbers labeled in position.

If you are unsure which part applies to your device, especially on pre-1997 units or unusual configurations, call Security Parts at 845-935-0301 or visit the contact page before ordering. Getting the correct part confirmed before ordering saves the cost and delay of a return. On fire-rated hardware, an incorrect part can also cause a NFPA 80 compliance failure during annual inspection.

Order Checklist Before You Place Your 22 Series Parts Order

Rim (22) or surface vertical rod (2227)?
Panic (no suffix) or fire rated (22-F or 2227-F)?
Manufacturing date: before or after July 1997?
Hex key dogging or cylinder dogging?
Match center case part number to your configuration: 109012 (rim) or 109358 (SVR)
Specify door width (3-foot or 4-foot) when ordering cover plates and push bar kits
Specify finish when ordering finished items

Related Von Duprin Resources at Security Parts

Von Duprin 98/99 Series exit device parts guide: the institutional flagship device most commonly specified alongside or replacing the 22 Series in high-traffic openings
Von Duprin panic bar selection guide: match every Von Duprin series to the right application
Von Duprin complete parts guide: all series and component categories in one reference
Von Duprin series guide: application overview for every active Von Duprin series
Rim exit devices guide: how rim devices work, when to specify them, and how to service them
Panic hardware for commercial doors: code requirements, device types, and selection guidance
Von Duprin 880NL trim guide: outside trim compatibility and selection for Von Duprin exit devices
Von Duprin panic bar parts: identification and ordering guide for panic bar components across series

About the Author

This guide was written by the Security Parts team, a commercial door hardware parts specialist serving locksmiths, facility managers, contractors, and service technicians since 2001. Security Parts stocks OEM and aftermarket replacement components for Von Duprin, LCN, Schlage, Falcon, and other leading commercial hardware manufacturers, with same-day shipping on stocked items and pre-order parts identification support at 845-935-0301.

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Von Duprin 6100 Electric Strike Parts: Box Assemblies, Compatibility, and OEM Replacements Wednesday, August 19, 2026

The Von Duprin 6100 is a heavy-duty, stainless steel electric strike built specifically for rim exit device applications. It is fire rated to UL10C, carries UL1034 burglary-resistant listing, and meets ANSI/BHMA Grade 1 with a 1,500 lb hold force. When a 6100 stops releasing correctly, the replacement path is a box assembly - the entire internal electromechanical unit that controls the keeper. Thirty OEM box assemblies are stocked at SecurityParts.com, organized by fail mode, voltage, and application. This guide covers every Von Duprin 6100 electric strike parts selection decision you need to make before placing an order.

For replacement parts across all Von Duprin electric strike series, including the 5100, 6200, and 6300, see the Von Duprin electric strike parts guide. This article is the dedicated 6100 resource.

Quick Answer

The Von Duprin 6100 is a rim exit device electric strike only. It is not compatible with cylindrical locks or mortise locks. Confirm the installed hardware is a rim exit device before ordering any 6100 part.
The primary replaceable component is the box assembly. The 6100 uses internally contained box assemblies that differ by fail mode (fail safe or fail secure), voltage (12VDC, 24VDC, or AC-compatible), and application (standard, dual switch, or specific function variants).
The 6100 is fire rated. UL10C listing covers up to 3 hours on single doors and 90 minutes on pair doors. Fail-secure configurations are available for fire-rated openings. Fail-safe configurations are non-fire-rated.
The 6100 ships standard as 24VDC fail secure. Confirm the installed voltage and fail mode from the existing device before ordering a replacement box assembly.
Browse all 30 available OEM parts at the 6100 series parts catalog at SecurityParts.com.

What Is the Von Duprin 6100 Electric Strike?

The Von Duprin 6100 is a heavy-duty rim electric strike designed for commercial and institutional openings where the primary hardware is a rim exit device. It is the standard specification for rim exit device openings requiring electric strike access control in high-traffic, high-security, or fire-rated applications.

Three product characteristics define the 6100 and distinguish it from other Von Duprin electric strike series:

Rim Exit Device Compatibility Only

The 6100 interfaces with the rim exit device latch mechanism via a movable keeper. It is not designed for cylindrical locks, mortise locks, or deadlatches. If the hardware is a cylindrical lock, specify the 5100 or 6200. If a mortise lock, specify the 6200.

Compatible rim exit device families include Von Duprin and Falcon rim series devices. The 6100 also supports retrofit with many legacy rim nightlatch applications.

Fire-Rated Construction

The 6100 carries UL10C fire listing, covering up to 3 hours on single doors and 90 minutes on paired doors. This is a critical distinction from the 5100, which has zero fire rating. If the door assembly carries a fire rating and electric strike access control is specified, the 6100 is the appropriate choice. For fire door hardware compliance requirements and what listings apply to specific assemblies, see the commercial door fire rating guide.

Heavy-Duty Stainless Steel Construction

The 6100 body is stainless steel construction rated for heavy institutional use. UL1034 burglary-resistant listing and ANSI/BHMA Grade 1 certification at 1,500 lb hold force are standard across all 6100 models. Two-piece plug connectors are included for ease of installation and for removal during strike servicing without cutting or re-terminating wires.

For a broader look at how electric strikes work, the differences between fail safe and fail secure, and wiring principles across all Von Duprin series, see the commercial electric strike parts guide. For wiring schematics, see the electric strike schematic diagram guide.

Von Duprin 6100 Electric Strike Parts: Box Assembly Selection Guide

The box assembly is the heart of the 6100. It contains the solenoid, the keeper release mechanism, and all internal components that control strike operation. When a 6100 fails to release or fails to hold, the box assembly is the replacement unit. SecurityParts.com stocks 30 OEM box assemblies for the 6100 series, organized by fail mode, voltage, and application type.

Before ordering any box assembly, confirm three things from the installed device: the fail mode (fail safe or fail secure), the operating voltage (12VDC, 24VDC, or AC), and whether a dual switch is required. These three variables determine the correct part number. All available box assemblies are at the 6100 series parts catalog.

Fail Safe Box Assemblies (12VDC)

Von Duprin 6100 Box Assembly, Fail Safe (Electrically Locked) 12VDC (part 111743). OEM replacement at SecurityParts.com.

In a fail safe configuration, the strike releases and allows the door to open when power is lost. This configuration is used on life safety egress openings where the door must be freely openable during a power failure. Fail-safe configurations are non-fire-rated.

111743 - Box Assembly, Fail Safe (Electrically Locked), 12VDC
111747 - Box Assembly, Fail Safe, Dual Switch (DS), 12VDC
112772 - Box Assembly, Fail Safe, 12VDC (alternate configuration)

Fail Secure Box Assemblies (12VDC)

Von Duprin 6100 Box Assembly, Fail Secure (Electrically Unlocked) 12VDC (part 111744). OEM replacement at SecurityParts.com.

In a fail secure configuration, the strike remains locked when power is lost. The door can only be unlocked by applying power. Fail-secure configurations are available for fire-rated openings.

111744 - Box Assembly, Fail Secure (Electrically Unlocked), 12VDC
111748 - Box Assembly, Fail Secure (Electrically Unlocked), 12VDC (alternate)
112773 - Box Assembly, Fail Secure, 12VDC (alternate configuration)

Fail Safe Box Assemblies (24VDC)

Von Duprin 6100 Box Assembly, Fail Safe (Electrically Locked) 24VDC (part 111745). OEM replacement at SecurityParts.com.

The 6100 ships standard as 24VDC fail secure. The 24VDC fail-safe box assembly is used when the installed power supply provides 24VDC and the opening requires fail-safe operation.

111745 - Box Assembly, Fail Safe (Electrically Locked), 24VDC
111749 - Box Assembly, Fail Safe, Dual Switch (DS), 24VDC

Fail Secure Box Assemblies (24VDC)

Von Duprin 6100 Box Assembly, Fail Secure (Electrically Unlocked) 24VDC (part 111746). OEM replacement at SecurityParts.com.

The standard factory configuration for new 6100 installations. Used on fire-rated openings and security-critical doors where maintaining the locked state during a power failure is required.

111746 - Box Assembly, Fail Secure (Electrically Unlocked), 24VDC
111750 - Box Assembly, Fail Secure, 24VDC (alternate)
112775 - Box Assembly, Fail Secure, 24VDC (alternate configuration)

Dual Switch (DS) Box Assemblies

Von Duprin 6100 Box Assembly, Fail Safe, Dual Switch (DS) 12VDC (part 111747). OEM replacement at SecurityParts.com.

Dual switch (DS) box assemblies include a door position switch and a bolt position switch in addition to the standard solenoid. These switches send status signals to an access control panel confirming door position and latch state. DS assemblies are required when the access control system calls for strike status monitoring.

If the existing installation has wiring beyond the standard two power leads, a DS assembly is installed. Count the wires before ordering.

111747 - Box Assembly, Fail Safe, Dual Switch (DS), 12VDC
111749 - Box Assembly, Fail Safe, Dual Switch (DS), 24VDC

Von Duprin 6100 Power and Voltage Requirements

The 6100 ships standard as 24VDC fail secure. Confirm the installed voltage before ordering a replacement box assembly.

24VDC: Standard factory voltage. Continuous duty at 0.33 A. Most common in commercial installations.
12VDC: Optional at time of original order. Used in installations where the access control panel supplies 12VDC.
AC operation: Optional. The 6100 can operate on AC power, unlike the 5100 which requires a DC rectifier for AC input. Confirm AC compatibility from the installed device label before ordering AC-rated box assemblies.

16VDC and 28VDC solenoid variants exist for legacy strikes at those voltages. Contact SecurityParts.com at 845-935-0301 before ordering if the device label shows a non-standard voltage.

The 6100 shares 6000 Series solenoid kits (050237, 050239, 050240) with the 6200 series as standalone solenoid replacements when the box assembly housing is intact. For access control integration context, see the access control and commercial door hardware integration guide.

Von Duprin 6100 Fail Safe vs Fail Secure: How to Identify the Installed Configuration

Ordering the wrong fail mode is the most common 6100 parts ordering error. The installed fail mode cannot be changed by swapping the box assembly alone in some configurations. Confirm the fail mode before placing any order.

How to Confirm Fail Mode Without Power

The most direct identification method is the device label. The fail mode is printed on the label affixed to the strike body. With the strike removed from the frame, locate the label and read the fail mode designation: FS for fail safe, FSE for fail secure.

If the label is illegible, the fail mode can be identified by function. Disconnect power to the strike. If the keeper (movable lip) can be pushed inward manually with the door latch, the strike is fail safe - it releases without power. If the keeper is rigid and cannot be moved without power applied, the strike is fail secure.

Fire-Rated Applications Require Fail Secure

On fire-rated assemblies, the electric strike must be fail secure. A fail-safe strike on a fire-rated opening creates a code compliance gap. Confirm the door fire rating before ordering. See the commercial door fire rating guide and the ANSI/BHMA standards guide.

Von Duprin 6100 Compatibility: Rim Exit Devices and Retrofit Applications

The 6100 is designed for rim exit devices. Compatibility extends across Von Duprin and Falcon rim series devices, as well as retrofit applications for legacy rim nightlatch hardware.

Von Duprin and Falcon Rim Exit Device Compatibility

The 6100 is compatible with Von Duprin rim series exit devices including the 98/99, 22, 33A/35A, 75, 78, 88, and 55 Series rim devices, as well as Falcon 19, 24, and 25 Series rim devices. For a full comparison of how Von Duprin rim exit device series differ from each other, see the Von Duprin exit device series comparison. For rim exit device part details, see the rim exit devices guide.

Retrofit Applications

The 6100 retrofits many legacy rim electric strike installations. Specific models replace Folger Adams 310-4 hardware with minor frame preparation. If replacing a Folger Adams unit, confirm the specific 6100 model from the existing device label or call SecurityParts.com before ordering.

Single Door and Double Door Applications

The 6100 series includes models for both single door and double door applications. Double door variants cover openings without a center mullion where the strike must span the gap between active and inactive leaves. Confirm the door configuration (single or double, with or without mullion) before selecting a 6100 model.

Common Von Duprin 6100 Electric Strike Problems and How to Diagnose Them

Most 6100 field failures are diagnosable without special equipment. The two-piece plug connector design makes the 6100 easier to service than many competing electric strikes because the box assembly can be removed and replaced without cutting wires.

Strike Does Not Release When Power Is Applied

Verify power at the strike terminals using a multimeter before concluding hardware failure. Measure voltage at the plug connector. If the correct voltage is present and the strike does not release, the box assembly solenoid has failed. If no voltage is present, the fault is upstream in the access control panel, power supply, or wiring run, not in the strike itself.

For fail-secure installations: if power is present and the strike does not release, the box assembly is the likely replacement. For fail-safe installations: if the strike does not release when power is removed, the same diagnosis applies.

Strike Releases Intermittently

Intermittent release is almost always a voltage drop at the strike. Measure voltage under load (solenoid energized). If voltage drops significantly below the rated value, the power supply or wire run is undersized. This is a wiring issue, not a box assembly failure. Replacing the box assembly will not resolve a voltage drop.

Keeper Does Not Return to Locked Position

If the keeper releases correctly but does not return to the locked position after the door closes, the keeper return spring inside the box assembly has failed. The correct repair is a full box assembly replacement. The keeper return mechanism is internal and is not serviceable as a standalone component.

Strike Operates Correctly But Door Does Not Latch

If the strike operates correctly but the door latch does not engage the keeper, the fault is alignment between the exit device latch and the strike keeper, not a failure of the strike itself. Check the keeper height and door gap before concluding that the strike is defective. For general commercial door hardware troubleshooting, see the commercial door hardware troubleshooting guide.

Von Duprin 6100 vs 6200 vs 6300: Which Series Is Right?

The 6100, 6200, and 6300 are all heavy-duty, fire-rated Von Duprin electric strikes, but they serve different applications. Understanding the key differences prevents wrong-series orders.

6100: Rim exit devices only. Five models covering single and double door configurations. Standard fail secure 24VDC. UL10C fire rated. Stainless steel construction with integrated faceplate.
6200: The most versatile series. 17 configurations covering cylindrical locks, mortise locks, deadlatches, and rim exit devices. Also UL10C fire rated. Shares the 6000 Series solenoid kits with the 6100.
6300: Surface-mount heavy-duty series for rim exit device applications where flush mounting is not possible or where the door prep does not accommodate a standard 6100 installation. The 6300 mounts on the surface of the frame rather than recessed into the frame.

Rim exit device with standard frame = 6100. Frame requires surface mount = 6300. Lock type other than rim exit device = 6200. Browse the 6300 series catalog and the Von Duprin 5100 guide for comparison.

How to Order the Correct Von Duprin 6100 Replacement Part

Confirm the hardware is a 6100. The series designation is on the strike body label (6100, 6111, 6112, etc.). If the label shows a different series, identify the correct series before ordering.
Identify the fail mode. Read FS or FSE from the device label. If illegible, test as described above. Fail safe and fail secure box assemblies are not interchangeable.
Confirm the operating voltage. Read from the device label or measure at the plug connector. Standard is 24VDC. For non-standard voltages, call 845-935-0301 before ordering.
Confirm dual switch. Count wires at the plug connector. Two wires = standard. Additional wires = dual switch (DS). Ordering a standard assembly for a DS installation removes status monitoring from the access control system.
Order the correct box assembly. Match fail mode, voltage, and DS requirement to the part number. All 30 box assembly options are at securityparts.com/series/6100-electric-strikes-2.

For OEM sourcing guidance and why aftermarket substitutes create risks on precision-fit electric strike components, see the OEM vs aftermarket commercial door hardware guide. Common parts ship same business day. Call 845-935-0301 for pre-order compatibility confirmation or visit the SecurityParts.com contact page. Browse the full electric strikes catalog and the Von Duprin parts catalog at SecurityParts.com.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Von Duprin, Schlage, LCN, Falcon, and Detex parts since 2001. All part numbers, voltage specifications, fire rating details, and compatibility information are verified against live SecurityParts.com product pages and official Von Duprin 6100 Series documentation. For Von Duprin 6100 electric strike parts and pre-order compatibility support, call 845-935-0301 or visit the SecurityParts.com contact page.

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Schlage L Series Mortise Lock Parts Guide: Functions, Trim, Cylinders and Replacement Components Wednesday, August 19, 2026

The Schlage L Series (L9000) is the benchmark Grade 1 commercial mortise lock with over 55 functions, 33 lever designs, 8 rose/escutcheon options, and 12 finishes. The function code (L9010, L9080, L9070, L9060, etc.) describes exactly how the lock operates. The auxiliary deadlatch prevents latchbolt shimming by mechanically locking the latch when the door is fully closed. Cylinder type affects security grade: conventional and FSIC cylinders maintain Grade 1 Security; SFIC cylinders reduce it to Grade 3 Security. For doors thicker than 1-3/4 inches, position codes (EE, EI, EO, ED) are required. The L9050 universal chassis converts to nine different functions with additional parts. Electrified EL (fail-secure) and EU (fail-safe) functions are field-selectable. SecurityParts.com stocks OEM Schlage L Series replacement parts for same-day shipping.

The Schlage L Series has been the commercial mortise lock specification standard since 1984. Its position in the market is not based on marketing alone: the L9000 case size (4-7/16 by 6-1/16 by 1 inch), the armor front (1-1/4 by 8 inches), the 2-3/4 inch backset, and the trim mounting dimensions have become the default American commercial mortise lock preparation that architects, specifiers, and facilities managers have standardized on for 40 years. Understanding how to specify, identify, and order parts for the L Series is a core competency for anyone working with commercial door hardware.

Browse Schlage L Series OEM replacement parts at Security Parts: Schlage L9000 Series mortise lock replacement parts and assemblies, Schlage L Series cylinders, Everest 29, Primus XP, SFIC, and FSIC cores, Schlage ND Series cylindrical locks for matching trim suiting with L Series, electric strikes for L Series access control integration, and the complete Schlage OEM parts catalog.

Schlage L Series Specifications at a Glance

Before diving into function codes and parts, these are the L Series physical specifications every specifier needs. They determine compatibility with the door preparation, the trim components required, and the cylinder selection.

Lock Case Dimensions

Case size: 4-7/16" W x 6-1/16" H x 1" D

Armor front: 1-1/4" x 8"

Strike: 1-1/4" x 4-7/8" square corner, 1-3/16" lip, box strike

Backset: 2-3/4" (standard, non-adjustable)

Door Thickness Range

Standard: 1-3/4" (44 mm)

Minimum: 1-3/8" (35 mm)

Over 1-3/4": Specify door thickness and position code (EE, EI, EO, ED)

ANSI/BHMA Certification

Standard: A156.13-2012, Series 1000, Grade 1 Operational, Grade 1 Security (conventional/FSIC cylinders)

FSIC: Grade 1 Operational, Grade 2 Security

SFIC: Grade 1 Operational, Grade 3 Security

Fire Rating and Warranty

Fire rating: UL Listed for 3-hour fire door (A label single doors 4' x 10'; pairs 8' x 10'). Exception: L9076 and L9077 are not 3-hour listed.

Mechanical warranty: 10 years

Electromechanical warranty: 3 years

L Series Function Codes: Every L9000 Function Explained

The function code is the most important identifier when ordering L Series parts, because different functions use different internal mechanisms, trim configurations, and operating cams. Before ordering any replacement part, confirm the function code from the lock case label (visible from the edge of the door).

Function Code	ANSI Name	Outside Lever	Inside Lever	Deadbolt/Deadlatch	Typical Application
L9010	Passage	Always free	Always free	Auxiliary deadlatch only	Corridors, non-security doors
L9020	Privacy (Inside Button)	Inside button locks outside lever; emergency release from outside	Always free	Auxiliary deadlatch; optional thumb turn	Restrooms, privacy offices
L9040	Classroom (School Security)	Key in outside cylinder locks/unlocks outside lever	Always free	Deadlatch; deadbolt in some variants	Classrooms, offices needing lockdown
L9050	Entrance (Half-Turn)	Outside lever free when unlocked; key or thumbturn for security	Always free	Optional deadbolt via thumbturn	Building entries; universal chassis
L9060	Apartment	Key retracts latch from outside	Lever free; thumbturn inside	Auxiliary deadlatch	Apartment entry, hotel rooms
L9070	Storeroom	Always fixed (key required for entry)	Always free	Auxiliary deadlatch	Stockrooms, restricted areas, server rooms
L9080	Office	Key or free turn from inside unlocks; otherwise fixed	Always free	Auxiliary deadlatch	Office doors (most common commercial function)
L9082	Office (No Outside Cylinder)	Lever always fixed; no outside cylinder	Always free	Auxiliary deadlatch	Rooms accessed only from inside
L9090	Vestibule	Key locks/unlocks outside lever	Key locks/unlocks inside lever	Auxiliary deadlatch	Building vestibule doors requiring control from both sides
L9460	Cylinder by Thumbturn Deadbolt	Key operates deadbolt	Thumbturn operates deadbolt	Full deadbolt throw only (no latch)	Deadbolt supplement on any door type

The L9050 universal chassis: the field conversion feature most facilities managers and locksmiths don't know about: The Schlage L9050 is the base L Series distributor chassis (L283-133 chassis, L9050LB distributor lock case) that Schlage designed as a field-convertible unit. With the L9050 case and the correct additional parts (springs, cams, blocking rings, driver bars), the same lock case can be converted into nine different L Series functions without replacing the chassis. This is the Schlage L Series equivalent of a universal door closer spring: one stocked part that can become multiple different products. Locksmiths who stock L9050 chassis units can service a broader range of L Series function failures in the field without carrying every function separately. Schlage's catalog specifies the conversion is valid for Everest cylinder installations and only for the functions listed in the L9050 conversion chart.

The Auxiliary Deadlatch: The Anti-Shim Mechanism That Defines Grade 1 Security

The auxiliary deadlatch (anti-shim latch) is the second, smaller latch adjacent to the main spring latchbolt on the L Series lock case. Its function is specific and critical: preventing the latchbolt from being retracted by shimming (inserting a thin flexible tool between the door and frame to depress the latch).

Here is how it works: when the door is fully closed in the frame, the door stop depresses the auxiliary deadlatch plunger into the lock case body. In this depressed position, a mechanical blocking plate inside the case intercepts the latchbolt operating mechanism, preventing any tool or spring force from retracting the latchbolt. The latchbolt can only be retracted by rotating the lever (which moves the blocking plate out of the way through the authorized mechanism) or by key operation.

When the auxiliary deadlatch is not engaging properly: If the auxiliary deadlatch plunger is not fully depressed by the door stop when the door is closed, the anti-shim protection is not active. Common causes: the strike is mounted too far from the door stop (excessive gap between door edge and frame), the door has warped enough that one corner does not fully close against the stop, or the strike plate has been installed without the required strike box (dust box). Without the strike box, the latch is projecting into an open pocket rather than being supported, and the auxiliary deadlatch plunger cannot contact the stop surface. Always install the L Series strike box with the face plate: the box is not optional.

Trim Options: Sectional vs Full-Size Roses and Escutcheons

Sectional Trim

Split rose design; most common specification

Design: The rose plate is in two sections (upper with cylinder/thumbturn, lower with lever hub), separated by a gap. The lever attaches to the lower rose section.

Advantage: Easier to remove the lever for cylinder access without removing the entire trim assembly. The upper section stays in place for cylinder maintenance.

Compatible with: Indicator trim options (the upper section can include a 180-degree visibility indicator showing occupancy status). Most L Series catalog specifications use sectional trim by default.

Standard spindle: 2-3/4" to 3" standard for 1-3/4" door. Specify extended spindles for thicker doors.

Full-Size Rose / Escutcheon Trim

One-piece plate design; architectural appearance

Design: A single rose plate covers both the cylinder/thumbturn and the lever hub area in one continuous piece. Available in five rose styles and two escutcheon styles.

Advantage: Cleaner architectural appearance, no gap between upper and lower sections, preferred for high-end interior design specifications.

Limitation: Removing the lever requires removing the entire rose/escutcheon plate, exposing the cylinder and all trim components. Slightly more disruptive for cylinder service than sectional trim.

Indicator trim: Not all indicator trim options are available with full-size roses. Check the L Series catalog for indicator compatibility with specific rose styles.

Cylinder Types and Their Effect on ANSI Security Grade

Cylinder Type	Operational Grade	Security Grade	Key Control	Notes
Conventional 6-pin (Everest C keyways)	Grade 1	Grade 1	Open keyways; limited key control	Standard specification for most commercial applications
Everest 29 restricted keyway	Grade 1	Grade 1	Restricted factory-controlled blanks	Key duplication control; available in R and other restricted families
Primus XP (sidebar mechanism)	Grade 1	Grade 1	Factory-controlled side bitting; 5 geo exclusivity levels	Maximum key control; pick and bump resistant; optional UL 437
FSIC (Full Size Interchangeable Core)	Grade 1	Grade 2	Interchangeable with Schlage FSIC system only	Fast rekeying but security grade reduced from G1 to G2
SFIC (Small Format Interchangeable Core)	Grade 1	Grade 3	Interchangeable with Best/Arrow/Sargent SFIC systems	Maximum rekeying flexibility; lowest security grade of the three

Browse Schlage L Series cylinders including Everest 29, Primus XP, SFIC, and FSIC replacement cylinders at Security Parts.

Door Thickness Position Codes: Ordering Trim for Thick Doors

The Schlage L Series standard spindle length is designed for 1-3/4 inch doors. For doors thicker than 1-3/4 inches, the trim components (spindle, rose mounting posts) must be extended to reach from the lock case to the face of the door. The position code describes how the lock case sits within the thicker door and which side(s) need extended trim.

Both inside and outside trim extended. Lock case centered in door thickness.

Inside trim extended only. Lock case shifted toward outside face of door.

Outside trim extended only. Lock case shifted toward inside face of door.

Both sides extended but at non-standard depths. Used for specific thick door applications.

How to measure and specify door thickness and position: Measure the total door thickness (not the nominal size stamped on the door: measure the actual material thickness at the lock edge). Subtract 1-3/4 inches to get the overage. Determine where the lock case sits: if the existing mortise pocket is centered in the door, use EE. If it is flush toward one face, use EI or EO for the opposite face extension. When ordering replacement trim for a known L Series installation on a thick door, the existing trim will show either an EE, EI, EO, or ED designation. Match the code when ordering replacement parts.

Electrified L Series: EL (Fail-Secure) and EU (Fail-Safe) Functions

The Schlage L Series electrified mortise lock (designated with L or LV prefix in the function code) uses a motor inside the lock chassis to control the outside lever independently of the mechanical lever mechanism. The inside lever always provides free mechanical egress regardless of the electrical state.

Both EL and EU are field-selectable: a DIP switch or jumper inside the lock case allows the installer to configure the electrical mode without ordering separate products. This field selectability is one of the L Series electrified advantages over competitive products that require ordering separate EL and EU versions.

RX (Request-to-Exit) and LX (Latchbolt Monitor) Contacts

Most L Series electrified functions include a microswitch positioned inside the lock case that activates when the inside or outside lever is rotated. The RX (request-to-exit) contact signals the access control panel when the inside lever is used, providing an exit event record. The LX (latchbolt monitor) contact signals whether the latchbolt is in the extended (door latched) or retracted (latch pulled) position. Both contacts are used for access control audit trail and door position monitoring required by compliance frameworks including SOC 2 Type II and ISO 27001. Browse Schlage L Series electrified mortise lock parts with RX and LX contacts at Security Parts.

Common Schlage L Series Failure Modes and Replacement Parts

Latchbolt sticks or does not retract with lever
The cam and spindle connection inside the lock case may be worn, or the latch case spring is fatigued. First check that the trim spindle is fully seated in the cam socket (loose spindle is the most common cause). If the spindle is seated, the cam return spring inside the case is the likely failure. OEM cam return spring kits for L9000 Series are available at SecurityParts.com.
Auxiliary deadlatch plunger does not return
The auxiliary deadlatch spring inside the case is worn or broken. The plunger is a replaceable component. OEM auxiliary deadlatch spring and plunger kits are available for L9000 Series cases at SecurityParts.com. This failure often appears as the latchbolt being unexpectedly shimmable on what should be a Grade 1 lock, because the anti-shim mechanism is disabled when the auxiliary deadlatch does not return to the extended position.
Outside lever droops or spins freely
The lever hub connection to the trim spindle is loose, or the spindle itself is worn at the cam interface. Check lever set screws (or locking bushing on inside lever) first. If the lever continues to spin freely after tightening, the spindle or cam interface inside the lock case is worn and requires a spindle or cam assembly replacement.
Cylinder stiff or key difficult to turn
The mortise cylinder plug is binding. Lubricate with graphite powder only (never oil in the cylinder plug). If stiffness continues after lubrication, the cylinder has worn or corroded pin chambers. OEM replacement cylinders for L Series (in any keyway and format) are available at SecurityParts.com as a drop-in replacement without disassembling the lock case.
Electrified function: lever locked when it should be unlocked
Check power supply voltage (12V or 24V DC) matches the lock specification. Check wiring polarity. The motor inside the L Series electrified chassis can be in the locked position if the correct power state is not achieved. The field-selectable DIP switch may also be in the wrong position (EL vs EU mode). Verify DIP switch position and power supply output before replacing the electrified chassis assembly.

For OEM replacement parts for all L Series failure modes, browse Schlage L9000 Series mortise lock replacement parts . Contact the team at 845-935-0301 or the contact page for parts identification support.

Why Choose Security Parts for Schlage L Series Mortise Lock Parts

Auxiliary deadlatch strike box requirement documented, SFIC security grade reduction explained, L9050 universal chassis conversion, position code measurement guide, EL/EU field selectability, and same-day OEM shipping.

Auxiliary Deadlatch Strike Box

We document that the L Series strike box is not optional: without the box, the auxiliary deadlatch plunger cannot contact the stop surface, the anti-shim protection is not active, and a Grade 1 lock can be shimmed. This is the most commonly missed installation requirement and the most common reason a Grade 1 lock fails to behave like a Grade 1 lock.

SFIC Security Grade Impact

We document that SFIC interchangeable cores reduce the L Series security grade from Grade 1 to Grade 3, which means specifiers who install SFIC for rekeying convenience on a Grade 1 specified project may be producing a non-compliant installation. This is never explained on product pages.

L9050 Universal Chassis

We document the L9050 universal chassis nine-function conversion capability that allows one stocked unit to become multiple different L Series functions with the correct additional parts. This is the field service feature that eliminates emergency backorders when a specific function fails in the field.

Same-Day OEM Shipping

Schlage L Series lock cases, trim, cylinders, and internal parts ship same day from US warehouses. Call 845-935-0301 or the contact page for parts identification and ordering support.

What Makes Security Parts Different for Schlage L Series Parts

We document the auxiliary deadlatch strike box requirement: without the box strike installed correctly, the auxiliary deadlatch plunger cannot contact the frame stop surface, the anti-shim blocking mechanism does not engage, and a Grade 1 L Series lock can be shimmed. This specific installation requirement is the most common cause of Grade 1 lock security failure in the field and is not documented on any competitor's product page.
We document that SFIC interchangeable core cylinders reduce the Schlage L Series security grade from Grade 1 Security to Grade 3 Security. Specifiers and facilities managers who install SFIC for rekeying convenience may be unknowingly delivering a Grade 3 security lock on a Grade 1 specified project. FSIC maintains Grade 2 Security. Conventional and Everest 29 cylinders maintain Grade 1 Security.
We document the L9050 universal chassis as the nine-function convertible base unit for field service, allowing one stocked chassis to be converted to the required function with additional parts rather than carrying every L Series function separately.
We document the EL/EU field selectability: both fail-secure and fail-safe modes are available in the same electrified L Series product with a DIP switch change, eliminating the need to order separate products for the two modes and reducing emergency stocking requirements.
We carry Schlage L9000 Series mortise lock replacement parts, Schlage L Series cylinder replacements in all formats, and access all supporting Allegion OEM components as an authorized Allegion parts distributor.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Schlage L Series Mortise Lock Parts

What does the Schlage L Series function code tell you about the lock?

The function code (L9010, L9080, L9070, etc.) identifies exactly how the lock operates: which side has a free lever, which side requires key authorization, and whether a separate deadbolt is present. L9010 = passage (free from both sides). L9080 = office (outside lever locked by default, key or inside thumbturn unlocks; inside lever always free). L9070 = storeroom (outside lever always fixed, key for entry; inside lever always free). L9060 = apartment (key from outside; lever and thumbturn from inside). The function code is essential before ordering any replacement part because different functions use different internal cams, springs, and blocking mechanisms.

What is the auxiliary deadlatch on the Schlage L Series mortise lock and why does it matter?

The auxiliary deadlatch is the smaller plunger adjacent to the main latchbolt. When the door fully closes, the frame stop depresses the plunger, which activates a blocking plate inside the case that prevents the latchbolt from being retracted by shimming. If the auxiliary deadlatch does not engage because the strike box is missing, the door is warped, or the strike is positioned too far from the stop, the anti-shim protection is not active and the Grade 1 lock can be bypassed by shimming. Always install the L Series box strike with the face plate.

What is the difference between SFIC and FSIC cylinder types in the Schlage L Series?

SFIC (Small Format Interchangeable Core) uses the Best/Arrow small plug format, compatible across multiple manufacturers. FSIC (Full Size Interchangeable Core) uses the Schlage-only Everest 29 FSIC format. Security grade impact: conventional and FSIC cylinders maintain Grade 1 Security; FSIC interchangeable cores reduce it to Grade 2 Security; SFIC reduces it to Grade 3 Security. Specifiers who need Grade 1 Security on the complete assembly should use conventional Everest 29 cylinders, not SFIC.

What are the Schlage L Series door thickness position codes?

Position codes are required for doors thicker than 1-3/4 inches: EE (both sides extended, case centered), EI (inside extended only, case toward outside), EO (outside extended only, case toward inside), ED (both sides at specific non-standard depths). Each code corresponds to specific spindle lengths and trim components. Ordering the wrong code for a thick door produces misaligned trim that cannot be installed. Measure actual door thickness and confirm the existing mortise pocket position before ordering trim for thick door replacements.

What is the L9050 universal chassis and what functions can it convert to?

The L9050 (L283-133 chassis/L9050LB distributor lock case) is a universal base chassis that converts to nine different L Series functions with additional parts (springs, cams, blocking rings, driver bars). Locksmiths and facilities managers who stock L9050 chassis units can field-convert to the required function without carrying every L Series function separately. Schlage's service manual specifies the conversion charts. Conversion applies to Everest cylinder installations and only to the functions listed in the conversion table.

What is the difference between the L Series EL and EU electrified versions?

EL (fail-secure): outside lever locked by default; power signal unlocks; remains locked on power loss. EU (fail-safe): outside lever unlocked by default; power signal locks; unlocks on power loss. Both are field-selectable in the same electrified L Series unit using a DIP switch inside the lock case. No separate product ordering needed. The inside lever always provides mechanical free egress regardless of the electrical state. The motor operates on 12 or 24V DC with low holding current. 10-year mechanical warranty; 3-year electromechanical warranty.

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Von Duprin 5100 Electric Strike Parts: Components, Compatibility, and OEM Replacements Tuesday, August 18, 2026

The Von Duprin 5100 electric strike is a medium-duty, field-configurable strike for cylindrical lock and deadlatch applications. Six Von Duprin 5100 electric strike parts are available as OEM replacements: faceplate, solenoid kit, two mounting packages, and two screw packages. This guide covers each component, its function, and what to verify before ordering.

For replacement parts across all Von Duprin electric strike series including the 6100, 6200, and 6300, see the Von Duprin electric strike parts guide. This article is the dedicated 5100 resource.

Quick Answer

The Von Duprin 5100 electric strike parts available at SecurityParts.com are: faceplate (050031), solenoid kit 12/24VDC (050034), mounting package standard (PKGMTG.1004), mounting package black (PKGMTG.1005), screw package standard (PKGSCR.1003), and screw package black (PKGSCR.1004).
The 5100 is not fire rated. It cannot be installed on fire-rated door assemblies. If fire rating is required, specify the Von Duprin 6200 or 6300 Series instead.
The 5100 works with cylindrical locks and deadlatches only. It is not compatible with mortise locks or rim exit devices.
The solenoid accepts 12 or 24 VDC. It will not operate reliably on AC power without a Von Duprin SO12 or SO24 rectifier kit.
Browse all available parts at the 5100 series parts catalog on SecurityParts.com.

What Is the Von Duprin 5100 Electric Strike?

The Von Duprin 5100 is a medium-duty electric strike for commercial cylindrical lock and deadlatch applications. Three faceplates are included in every box to cover hollow metal, wood, and aluminum frame applications. The power fail mode is field selectable. The solenoid accepts 12 or 24 VDC on a single unit.

The 5100 is positioned as a general commercial and retail electric strike for interior and exterior doors where fire-rated hardware is not required. It is compatible with Schlage, Falcon, and most other manufacturers' cylindrical locks with a latch throw up to 5/8 inch, as well as many aluminum narrow-stile deadlatches.

It is not specified for high-security, high-cycle, or fire-rated applications. The 5100's strength is flexibility and ease of installation on standard commercial openings. For wiring principles that apply across all Von Duprin series, see the commercial electric strike parts guide.

Von Duprin 5100 Electric Strike Parts and Replacement Components

SecurityParts.com stocks six OEM replacement parts for the Von Duprin 5100 series. All are available at the 5100 series parts catalog.

050031 Electric Strike Faceplate

Von Duprin 5100 Electric Strike Faceplate (part 050031). Standard finish. OEM replacement at SecurityParts.com.

The faceplate mounts flush with the frame face and provides the latch pocket. The standard 5100 ships with three faceplates (hollow metal, wood, and aluminum), so replacement is needed when the installed faceplate has been damaged. Part 050031 is the standard finish replacement. Order it when the faceplate needs replacing and the housing and solenoid remain functional.

050034 Solenoid Kit 12/24VDC

Von Duprin 5100 Solenoid Kit 12/24VDC (part 050034). OEM replacement at SecurityParts.com.

The solenoid is the electromechanical component that retracts or holds the keeper when power is applied. It is the most commonly replaced internal component in any electric strike, and the 5100 is no exception. When the strike clicks but the keeper does not move, or when the strike does not respond to power at all, the solenoid is the first component to test.

Solenoid power specifications for the 5100:

12 VDC: 0.38 A
24 VDC: 0.19 A
Input: non-polarized
AC operation: not supported directly. Requires Von Duprin SO12 or SO24 rectifier kit to convert AC to DC.

Part 050034 is the complete solenoid kit for the 5100, covering both 12 and 24 VDC. Before ordering, confirm the supply is DC, not AC.

PKGMTG.1004 Mounting Package

Von Duprin 5100 Mounting Package (PKGMTG.1004). Standard finish. OEM replacement at SecurityParts.com.

The mounting package contains the hardware required to secure the 5100 strike body to the frame. Order when mounting hardware is lost, corroded, or inadequate for the frame condition.

PKGMTG.1004 is the standard finish mounting package. Order this when the existing hardware finish is standard and the frame material is compatible with the standard mounting configuration.

PKGMTG.1005 Mounting Package (Black)

Von Duprin 5100 Mounting Package Black (PKGMTG.1005). OEM replacement at SecurityParts.com.

PKGMTG.1005 is the black finish mounting package. Order this when the installed 5100 is in a black finish configuration. Confirm the installed finish before ordering.

PKGSCR.1003 Screw Package

Von Duprin 5100 Screw Package (PKGSCR.1003). Standard finish. OEM replacement at SecurityParts.com.

PKGSCR.1003 is the standard finish screw package, containing fasteners used to secure the faceplate and strike body. Order when fasteners are stripped, lost, or corroded.

PKGSCR.1004 Screw Package (Black)

Von Duprin 5100 Screw Package Black (PKGSCR.1004). OEM replacement at SecurityParts.com.

PKGSCR.1004 is the black finish screw package. Order when the installed 5100 is black finish.

Von Duprin 5100 Compatibility and Applications

The 5100 is compatible with the following lock types and door configurations:

Lock type: Cylindrical locks and deadlatches only. The 5100 is not compatible with mortise locks or rim exit devices.
Latch throw: Up to 5/8 inch. Confirm the latch throw on the installed cylindrical lock before specifying the 5100.
Cylindrical lock brands: Compatible with Schlage, Falcon, and most other manufacturers' cylindrical locks meeting the 5/8-inch throw requirement.
Narrow stile deadlatches: Compatible with many aluminum narrow-stile deadlatch applications.
Door applications: Interior and exterior commercial doors. Not for fire-rated door assemblies.

The 5100 is not specified for high-security or institutional-grade applications requiring the cycle count and abuse resistance of the 6200 or 6300 Series. It is best suited for retail and light commercial openings where cylindrical lock hardware is installed and fire rating is not a requirement.

Von Duprin 5100 Faceplate and Frame Compatibility

One of the 5100's key advantages is that every unit ships with three faceplates, covering the three most common commercial frame types:

Hollow metal frame faceplate
Wood frame faceplate
Aluminum frame faceplate

This multi-faceplate approach eliminates the need to specify the frame type at the time of ordering the device. The installer selects and installs the correct faceplate on site. The adjustable keeper further accommodates frame variations, including openings with weather stripping or tight door preps where a fixed keeper would cause alignment problems.

When replacing a faceplate, confirm which of the three faceplates was installed. Part 050031 is the standard finish replacement. Call 845-935-0301 before ordering if the installed faceplate finish does not match standard.

Von Duprin 5100 Power and Wiring Requirements

The 5100 solenoid is rated for 12 or 24 VDC. A single unit handles both voltages, which simplifies multi-door projects where panel voltage may vary.

Key wiring facts for the 5100:

Power input is non-polarized. Wire polarity does not matter for DC operation.
The strike will not operate reliably on AC power. If the power supply outputs 12 or 24 VAC, a Von Duprin SO12 or SO24 AC-to-DC rectifier kit is required to convert the supply before it reaches the strike.
Current draw: 0.38 A at 12 VDC, 0.19 A at 24 VDC.
For DC power supply selection, the Von Duprin PS902 series power supply is a recommended option for this strike.

A common field problem is applying 24 VAC directly to the 5100. In this configuration the strike may work in one door handing but not when flipped to the other handing. This is not a defective strike. It is a wiring mismatch. Install the SO24 rectifier kit to convert to 24 VDC and the problem resolves.

For wiring diagrams and schematic references, see the electric strike schematic diagram guide.

Fail-Safe vs Fail-Secure on the Von Duprin 5100

The 5100 allows the power fail mode to be selected in the field. No tools are required for conversion. Understanding which mode is installed is essential before ordering a replacement solenoid or troubleshooting a strike that is not responding as expected.

Fail Safe (FS): The strike releases the latch and allows the door to open when power is lost. This is the appropriate specification for emergency egress applications where the door must be freely openable during a power failure.
Fail Secure (FSE): The strike holds the latch and keeps the door locked when power is lost. This is appropriate for security-sensitive openings where maintaining the locked state during a power failure is required.

To identify the mode on an installed 5100: if the door opens freely when the power supply is disconnected, it is fail safe. If the door remains locked when power is disconnected, it is fail secure.

When troubleshooting a 5100 that appears non-functional, confirm the fail mode before concluding there is a hardware fault. A fail-secure strike with no power at the strike will remain locked - which is correct operation, not a failure. A fail-safe strike with no power will release - also correct. The fault is only confirmed when the strike does not behave consistently with its configured fail mode.

Is the Von Duprin 5100 Fire Rated?

No. The Von Duprin 5100 electric strike is not listed for fire-rated door assemblies. It cannot be installed on a fire-rated opening as the primary latching mechanism.

If the door assembly carries a fire rating, the 5100 is not the correct specification. The Von Duprin 6200 or 6300 Series electric strikes carry UL fire-exit hardware listing and are appropriate for fire-rated door assemblies where electric strike hardware is required.

Before installing or replacing an electric strike on any commercial door, confirm the fire rating of the door assembly. A fire-rated door with a non-rated electric strike installed as the latch mechanism creates a code compliance gap that may be identified during AHJ inspection. For fire door hardware requirements and what listings apply to fire-rated assemblies, see the commercial door fire rating guide.

Common Von Duprin 5100 Electric Strike Problems

Most 5100 field failures are diagnosable without special equipment. The following are the most common problems and their most likely causes:

Strike Clicks But Keeper Does Not Move

The solenoid is activating but the mechanical release is not functioning. This indicates a solenoid assembly failure or a mechanical jam in the keeper mechanism. Check the keeper for physical obstructions first. If the keeper is free but not retracting, the solenoid kit (050034) is the likely replacement part.

Strike Does Not Respond to Power

Verify power at the strike terminals before concluding hardware failure. Measure voltage at the strike with a multimeter. If the correct DC voltage is present at the strike and there is no solenoid activation at all, the solenoid has failed and needs replacement (050034). If no voltage is present, the fault is upstream in the power supply or wiring, not in the strike itself.

Strike Works in One Door Handing But Not the Other

This is almost always caused by AC power being applied to the strike without a rectifier. The 5100 solenoid is designed for DC power. AC power can cause directional behavior because the solenoid coil responds asymmetrically to alternating current polarity. Install the Von Duprin SO12 or SO24 rectifier kit to convert AC to DC before the strike.

Door Does Not Latch When Strike Is Powered

Confirm the fail mode configured on the strike. In fail-safe mode, the door unlatches when power is present. If the strike is wired in a normally-energized configuration on a fail-safe unit, the door will remain unlatched whenever the system is powered. Review the system design to confirm that the power control logic matches the configured fail mode.

Von Duprin 5100 vs 6200: Which Electric Strike Is Right?

The 5100 and 6200 are both Von Duprin electric strikes, but they serve different applications. Understanding the key differences prevents wrong-product orders.

Fire rating: The 5100 is not fire rated. The 6200 carries UL fire-exit hardware listing. If the door is fire-rated, the 6200 is the correct specification.
Lock compatibility: The 5100 works with cylindrical locks and deadlatches only. The 6200 also works with mortise locks and rim exit devices.
Construction grade: The 5100 is medium-duty. The 6200 is heavy-duty stainless steel for high-cycle institutional applications.

If the opening now requires fire-rated hardware or mortise lock compatibility, specify the 6200 rather than a like-for-like 5100 replacement. Browse the 6100 series and 6300 series parts catalogs at SecurityParts.com for comparison.

How to Choose the Correct Von Duprin 5100 Replacement Part

Follow this sequence before placing any 5100 parts order:

Confirm the device is a 5100. The model number is stamped on the strike housing. If the model number starts with 5100, you are in the right series. If it starts with 6100, 6200, or 6300, the parts are different and not interchangeable.
Identify the failing component by symptom. No response to power: solenoid (050034). Damaged faceplate: 050031. Missing or corroded mounting hardware: PKGMTG.1004 (standard) or PKGMTG.1005 (black). Stripped or missing fasteners: PKGSCR.1003 (standard) or PKGSCR.1004 (black).
Confirm the finish. Standard finish parts (050031, PKGMTG.1004, PKGSCR.1003) and black finish parts (PKGMTG.1005, PKGSCR.1004) are separate SKUs. Ordering the wrong finish results in a visible mismatch on the frame.
Verify power supply before ordering a solenoid. A solenoid that fails because of an AC power input issue without a rectifier will fail again after replacement if the wiring is not corrected. Confirm DC voltage is present at the strike before concluding solenoid failure.
Call before ordering if unsure. The SecurityParts.com team is available at 845-935-0301 for pre-order compatibility confirmation. This prevents returns and keeps the opening in service.

Browse all six OEM 5100 parts at the 5100 series parts catalog. For the full Von Duprin parts catalog, see securityparts.com/von-duprin. For OEM sourcing guidance, see the OEM vs aftermarket commercial door hardware guide. Contact the team directly at the SecurityParts.com contact page.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Von Duprin, Schlage, LCN, Falcon, and Detex parts since 2001. All part numbers, voltage specifications, compatibility details, and product descriptions are verified against live SecurityParts.com product pages and official Von Duprin documentation. For Von Duprin 5100 electric strike parts and pre-order compatibility support, call 845-935-0301 or visit the SecurityParts.com contact page.

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Commercial Door Hardware for Religious Facilities: Churches, Mosques, Synagogues and ADA and Panic Hardware Guide Tuesday, August 18, 2026

Religious facilities (churches, mosques, synagogues, temples) are classified as IBC Group A-3 assembly occupancies. Panic hardware is required on doors serving assembly spaces with an occupant load of 50 or more under the IBC (100 or more under NFPA 101). ADA Title III completely exempts religious organizations from its accessibility requirements, but state building codes may require lever hardware independently during renovations. Historic worship buildings on the National Register face Section 106 NHPA review for federally funded projects and the Secretary of the Interior's Standards reversibility requirement for all hardware modifications. Automatic door openers on secondary entrances are the preferred accessible entry solution that satisfies both accessibility needs and historic preservation constraints.

A church with a 600-seat sanctuary, a fellowship hall that seats 200, and a historic 1890s door on the main entrance is three distinct hardware problems simultaneously. The sanctuary requires Von Duprin exit devices. The fellowship hall may or may not require them depending on which code the jurisdiction has adopted. The historic entrance door must meet accessibility needs without permanently altering the historic fabric. And none of this is clearly governed by the ADA, which the congregation's leadership may believe exempts them from all of it. Understanding how the occupancy code, the ADA exemption, and the historic preservation framework interact is the starting point for every religious facility hardware specification.

Browse parts for religious facility hardware at Security Parts: Von Duprin 98/99 Series exit device parts for church sanctuary and fellowship hall egress doors, LCN 4040XP door closer parts for self-closing fire corridor doors, Schlage ND Series cylindrical lock parts for office and classroom doors, Von Duprin exit alarm parts for monitored secondary exits, and the complete Allegion religious facility hardware catalog.

A-3 IBC Group A-3: the assembly occupancy classification for churches, mosques, synagogues, and all places of religious worship

50 vs 100 Panic hardware occupant load threshold: 50 persons under IBC, 100 persons under NFPA 101 for assembly occupancies including worship spaces

Title III exempt 42 U.S.C. Section 12187 completely exempts religious organizations from ADA Title III public accommodation requirements, but state building codes apply independently

Reversibility Secretary of the Interior's Standards require hardware modifications to historic worship buildings be reversible without damaging historic fabric

IBC Group A-3 Occupancy: Why Church Door Hardware Is Governed by Assembly Code

Under the IBC, all places of religious worship, regardless of faith tradition, are classified as Assembly Group A-3. This classification places churches, mosques, synagogues, temples, chapels, and meeting houses in the same category as funeral parlors, community halls, libraries, and museums. The A-3 designation is used for assembly spaces that do not fit the more specific A-1 through A-2 categories (fixed seating theaters and restaurants). Group A-3 carries the full assembly occupancy requirements of the IBC, including egress requirements, panic hardware thresholds, and self-closing requirements on fire-rated corridor doors.

Under NFPA 101, a house of worship is defined as an assembly occupancy when it is used for the gathering of 50 or more people for worship. Spaces used for fewer than 50 people for worship may be classified differently under NFPA 101, which is one of the reasons the IBC and NFPA 101 produce different panic hardware thresholds for the same building.

The mixed-occupancy reality of most religious campuses: A modern church campus or religious facility complex typically contains multiple occupancy types. The main sanctuary is A-3 assembly. The attached school or educational wing is E (educational) occupancy. The parsonage or pastor's residence is R-2 or R-3 residential. Administrative offices are B (business) occupancy. Each occupancy type has distinct hardware requirements, and the fire separation walls between them must carry the appropriate ratings with compliant fire-rated hardware. Applying A-3 assembly hardware requirements throughout the entire religious campus is over-specification. Applying office hardware throughout the sanctuary is a life safety citation risk.

Panic Hardware Threshold Calculation for Sanctuary Spaces

The panic hardware requirement for a sanctuary depends on its calculated occupant load, not its building permit capacity or the congregation's typical attendance. The IBC uses specific load factors to calculate occupant load, and the result determines which doors require panic hardware.

Sanctuary Occupant Load Calculation Examples

40 fixed seats Fixed seating occupant load = number of fixed seats (not floor area) No panic hardware required (IBC or NFPA 101)

75 fixed seats Fixed seating occupant load = 75 persons IBC: panic required. NFPA 101: not required. Confirm adopted code with AHJ.

700 sq ft open floor (no fixed seats) 7 sq ft per person (concentrated assembly) = 100 persons IBC and NFPA 101: panic hardware required

For sanctuaries with fixed pews or seating, the occupant load is the number of fixed seats. For open-floor sanctuaries used for standing prayer (common in mosques and many contemporary churches), the occupant load is calculated using the concentrated assembly load factor of 7 square feet per person. A 700-square-foot prayer hall with no fixed seating has a calculated occupant load of 100 persons, reaching the NFPA 101 panic hardware threshold.

Doors Without Locks: The Panic Hardware Escape Many Religious Facilities Miss

Under both the IBC and NFPA 101, panic hardware is only required on doors that have a lock or latch. A door equipped with push/pull hardware and no latching or locking mechanism does not require panic hardware, regardless of the occupant load it serves. Many smaller chapels and prayer rooms install simple push/pull hardware on egress doors specifically to avoid the panic hardware requirement. This is code-compliant when the door is not on a required means of egress from a space that has latching on other egress doors, but the IBC requires that if any door on the required egress path from a space has a lock or latch, all doors on that path require panic hardware. Browse Von Duprin exit device parts for church and religious facility egress doors at Security Parts.

ADA Title III Exemption for Religious Organizations: What It Covers and What It Does Not

Title III of the ADA (42 U.S.C. Section 12187) completely exempts religious organizations and all entities they control from its public accommodation accessibility requirements. This is one of the broadest exemptions in the ADA: unlike the tax exemption, which has conditions and reporting requirements, the Title III religious exemption is unconditional. A church is not required to install lever hardware, reduce door opening force below 5 pounds, provide automatic door openers, or widen doorways under ADA Title III, regardless of the size of the congregation or how publicly the space is used.

ADA Title III exemption applies: no legal obligation

Churches, mosques, synagogues, temples, and all entities they control are completely exempt from ADA Title III public accommodation requirements. This includes lever hardware, door opening force, accessible entry, and all other Title III requirements.

Federal funding programs: ADA and Section 504 apply regardless of exemption

If the religious organization operates any program receiving federal financial assistance (Head Start, FEMA disaster relief, federal grants, HUD community development funds), those federally funded programs must comply with accessibility requirements under Section 504 of the Rehabilitation Act of 1973 and any applicable federal accessibility standards, regardless of the ADA religious exemption.

State building codes and IBC: lever requirements apply independently during renovation

The ADA exemption does not affect state building code requirements. Many jurisdictions adopt the IBC with accessibility provisions that require lever hardware in alterations to assembly occupancies. When a religious facility undertakes a renovation project that triggers building permit requirements, the state building code lever requirements may apply independently of the ADA exemption. A church that is legally exempt from ADA Title III may still face lever hardware requirements under the state building code during a renovation, and may not realize the distinction.

Moral and mission case for voluntary compliance regardless of legal obligation

Many religious organizations choose to install lever hardware, automatic door openers, and accessible entries voluntarily because accessibility aligns with their mission of welcoming all members of the community. The legal exemption determines what is required; the organization's values determine what is right. SecurityParts.com carries lever hardware, automatic door opener parts, and low-force closer parts that support voluntary accessible entry programs for religious facilities.

Historic Worship Buildings: Section 106 and the Reversibility Requirement

Historic churches, synagogues, mosques, and meeting houses listed on the National Register of Historic Places (or eligible for listing) face two overlapping frameworks when planning door hardware modifications: Section 106 of the National Historic Preservation Act, and the Secretary of the Interior's Standards for Rehabilitation.

Section 106 Review: When It Applies

Section 106 of the National Historic Preservation Act (54 U.S.C. Section 306108) requires federal agencies to review the effects of federally funded projects on National Register properties and consult with the Advisory Council on Historic Preservation before spending federal funds. The trigger is federal funding: a grant, loan guarantee, permit, or license from a federal agency for the project. If the religious facility's hardware project uses any federal funding, Section 106 review may apply, and hardware changes that alter the historic character of the building may require consultation with the State Historic Preservation Officer (SHPO).

Secretary of the Interior's Standards: The Reversibility Requirement

The Secretary of the Interior's Standards for Rehabilitation apply when a project seeks to meet these standards (required for federal tax credits, common for grant-funded preservation projects, and recommended for any project affecting a National Register property). Standard 9 of the Standards requires that new additions and alterations be reversible: they must be installable and removable without damaging or permanently altering the historic fabric of the building. For door hardware, this means:

New holes in historic door or frame faces violate reversibility if the historic hardware was not previously drilled at those locations. Adding a modern lever set that requires a 2-1/8 inch bore hole through a historic mortise lock door violates the standard.
Surface-applied hardware using existing screw locations is generally acceptable if it uses the existing hardware preparation without creating new penetrations in the historic material.
The automatic door opener on a secondary entrance is the preferred solution because the opener can be mounted on a bracket that uses compatible fasteners in the frame or an adjacent new element (accessibility post), and the historic primary door is not modified.
Closer replacement with the same footprint is acceptable when the replacement does not require new screw holes in the historic surface. LCN offers several models with the same mounting pattern as historic LCN closers, allowing direct replacement without new drilling.
Consult SHPO before specifying for any project involving a National Register property or a property that may be eligible. SHPO consultation early in the design process prevents costly specification changes after a Section 106 adverse effect finding.

The automatic door opener detail that satisfies both preservation standards and accessibility requirements: Traditional Building Magazine, reviewing historic religious facility accessibility projects, documents the preferred approach for primary entrance doors with significant historic character: install a low-energy automatic door opener on a surface bracket mounted to the door frame (not the door itself) without modifying the historic door, and locate the push-button activator on a new freestanding accessibility post adjacent to the entrance. The opener provides the power-assisted opening force that satisfies accessibility needs. The historic door and its hardware remain unmodified and fully reversible. The new elements (bracket and post) are identified as new additions rather than alterations to the historic fabric. This approach has been accepted by SHPO and the Advisory Council on Historic Preservation in multiple historic religious facility accessibility projects.

Fire Door Requirements in Religious Facility Buildings

The ADA Title III exemption and the historic preservation reversibility standard do not affect fire safety code requirements. Fire-rated corridor doors, stairwell doors, and occupancy separation walls in religious facility buildings must meet the same NFPA 80 and IBC requirements that apply to any other assembly building.

Self-Closing Requirements on Fire-Rated Doors

Fire-rated corridor doors in church buildings must be self-closing, regardless of whether the congregation considers the door aesthetically suitable or functionally convenient. This is a consistent NFPA 80 and IBC requirement. Propped fire doors in church corridors and fellowship hall passages are one of the most commonly cited fire safety violations in annual fire door inspections of religious facilities. LCN Sentronic (hold-open) closers connected to the fire alarm system are the code-compliant solution for fire-rated doors that need to be held open during services and events. Browse LCN door closer and Sentronic hold-open parts for religious facility fire-rated corridor doors at Security Parts.

Occupancy Separation Requirements for Multi-Use Religious Campuses

Religious campuses that include educational wings (classified as E occupancy), administrative offices (B occupancy), or residences (R occupancy) must provide fire-rated occupancy separations between these use groups and the A-3 sanctuary. The IBC Section 508.4 separation table specifies the required rating between each occupancy combination. All doors in these separation walls must carry the appropriate fire label and be installed with listed hardware including closers, latching hardware, and fire-rated hinges.

Religious Facility Door Hardware Specification Schedule

Set	Location	Occupant Load	Hardware	Parts Source
R-1	Main sanctuary exits (IBC)	50+ occupants	Von Duprin 98/99 Series exit device (fire exit hardware if fire-rated wall); LCN closer on fire-rated openings	Von Duprin exit device parts
R-2	Fellowship hall exits (IBC)	50+ occupants	Von Duprin exit device if hall exceeds 50 occupants; standard lever otherwise	Von Duprin exit device parts
R-3	Corridor fire doors	N/A	LCN 4040XP closer; positive-latching cylindrical lock; fire-rated label; Sentronic hold-open if needed	LCN door closer parts
R-4	Office / classroom doors	N/A	Schlage ND Series office or classroom function; lever per IBC alteration requirements	Schlage ND Series parts
R-5	Historic main entrance (National Register)	N/A	Historic hardware preserved; automatic door opener on surface bracket; push-button on freestanding post; reversible installation per Secretary of Interior Standards	LCN automatic operator parts
R-6	Secondary monitored exits	N/A	Von Duprin exit device with exit alarm; NRP security hinges on outswing exterior doors	Von Duprin exit alarm parts

Contact SecurityParts.com at 845-935-0301 or the contact page for religious facility hardware specification and OEM parts support.

Why Choose Security Parts for Religious Facility Hardware Parts

Three-layer compliance framework documented (building code, ADA exemption limits, historic preservation), mosque floor plan example from iDighardware, automatic opener as reversibility solution, and same-day OEM shipping.

ADA Exemption Limits Documented

We document the three exceptions where ADA Title III exemption does not protect religious facilities: federal funding programs (Section 504 applies), state building code lever requirements (apply independently during renovations), and the moral case for voluntary compliance. Most church leadership does not know these distinctions.

Fixed Seating Occupant Load

We document the critical IBC rule that fixed seating occupant load = number of fixed seats, not floor area. A sanctuary with 75 fixed pews has an occupant load of 75 regardless of how large the floor area is. This calculation drives the panic hardware requirement and is misapplied in many religious facility specifications.

Historic Reversibility Solution

We document the specific automatic door opener on surface bracket approach that satisfies both accessibility needs and the Secretary of the Interior's Standards reversibility requirement for historic worship buildings, without modifying the historic primary entrance door.

Same-Day OEM Shipping

Von Duprin, LCN, and Schlage religious facility hardware parts ship same day from US warehouses. Call 845-935-0301 or the contact page for specification support.

What Makes Security Parts Different for Religious Facility Hardware Parts

We document the IBC vs NFPA 101 panic hardware threshold difference (50 vs 100 occupants) in the specific context of worship spaces, with three worked examples showing how fixed seating occupant load, open floor occupant load, and the push/pull no-latch escape interact to determine the panic hardware requirement for specific prayer rooms and sanctuaries.
We document the three-layer ADA exemption framework for religious facilities: what Title III exempts completely, what federal funding programs trigger regardless of the exemption, and what state building codes require independently during renovation projects. The "churches are exempt from ADA" statement is true for Title III and misleading for the full compliance picture.
We document the Section 106 NHPA trigger for religious facility door hardware projects: any project receiving federal funding that affects a National Register property may require SHPO consultation before hardware changes are made, and hardware that alters historic character may be found to have an adverse effect requiring mitigation.
We document the specific automatic door opener approach (bracket on frame, push-button on freestanding post, historic door unmodified) that Traditional Building Magazine and SHPO consultations have accepted as the preferred reversible accessible entry solution for historic worship buildings.
We carry Von Duprin exit device parts, LCN door closer and Sentronic hold-open parts, Schlage ND Series lever lock parts, and Von Duprin exit alarm parts for the complete religious facility hardware specification.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Religious Facility Door Hardware

What IBC occupancy classification applies to churches, mosques, and synagogues?

All places of religious worship are classified as IBC Group A-3 (Assembly Group A-3: buildings used for worship, recreation, or amusement not classified in other assembly groups). Under NFPA 101, a house of worship is an assembly occupancy when used for gathering of 50 or more people for worship. The A-3 classification triggers assembly occupancy egress requirements including panic hardware at the appropriate occupant load threshold, self-closing requirements on fire-rated corridor doors, and egress lighting requirements.

When is panic hardware required in a church or house of worship?

IBC: panic hardware is required on doors serving assembly occupancies with an occupant load of 50 or more if the door has a lock or latch. NFPA 101: threshold is 100 occupants. Fixed seating sanctuaries use the number of fixed seats as the occupant load. Open floor prayer spaces use the concentrated assembly load factor of 7 square feet per person. Doors with push/pull hardware and no lock or latch do not require panic hardware under either code. Confirm the adopted code with the local AHJ before finalizing specifications.

Are churches and religious organizations exempt from ADA door hardware requirements?

Title III of the ADA (42 U.S.C. Section 12187) completely exempts religious organizations from its public accommodation accessibility requirements. However, three exceptions apply: programs receiving federal funding must comply with Section 504 accessibility requirements regardless of the ADA exemption; state building codes may require lever hardware during renovations independently of the ADA; and the IBC may require lever hardware in alteration projects. Many religious facilities that are legally exempt from ADA Title III still face lever hardware requirements under the state building code when they pull renovation permits.

What is the historic preservation hardware constraint for churches on the National Register?

Section 106 of the NHPA requires review of effects on National Register properties for federally funded projects. For projects using no federal funds, Section 106 does not apply, but the Secretary of the Interior's Standards for Rehabilitation are still the relevant framework for preservation-conscious projects. The Standards require reversibility: hardware modifications must be installable and removable without damaging historic fabric. New bore holes in historic door faces violate reversibility. Surface-applied hardware using existing preparations and automatic door openers on brackets not touching the historic door satisfy the standard.

Why is the automatic door opener the preferred accessible entry solution for historic worship buildings?

The automatic low-energy door opener mounted on a surface bracket attached to the frame (not the door itself) leaves the historic primary entrance door and its hardware completely unmodified and fully reversible. A push-button activator on a freestanding accessibility post adjacent to the entrance allows operation without touching the historic hardware. This approach is accepted by SHPO consultations and the Advisory Council on Historic Preservation when the historic door cannot be modified under the Secretary of the Interior's Standards reversibility requirement. The opener addresses the accessibility need (power-assisted opening of a heavy historic door) while preserving the historic character that makes the church a National Register property.

What fire door requirements apply to corridor doors and stairwell doors in a church building?

Fire safety code requirements apply fully to religious facilities regardless of ADA exemptions or historic preservation status. Fire-rated corridor doors must be self-closing, positive-latching, and installed with listed hardware. Propped fire corridor doors are among the most common fire inspection violations in religious facilities. LCN Sentronic hold-open closers connected to the fire alarm are the code-compliant solution for doors that need to stay open during services. Occupancy separation walls between the A-3 sanctuary and attached E educational or B office occupancies require fire-rated doors with closers and listed hardware.

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Commercial Door Hardware Replacement and Repair Guide: OEM vs Aftermarket, Parts ID and Common Failures Monday, August 17, 2026

Installing non-listed aftermarket hardware on a fire-rated door assembly voids the UL listing and generates an NFPA 80 annual inspection citation requiring correction before the building passes. OEM parts from authorized Allegion distributors like SecurityParts.com are the only safe choice for fire-rated openings. For parts identification: LCN closer model and date code are on the cylinder body and near the packing nut at the pinion base. Von Duprin product name and series are imprinted on the device without disassembly. Schlage lock function and series are on the case label accessible from the edge of the door. Common failures to repair vs replace: adjust for slamming doors, replace for oil leaking closers, repair latch return springs in exit devices, replace any non-listed hardware on fire-rated assemblies regardless of apparent function.

Most commercial door hardware failures have a correct repair path and a wrong one. The wrong path is finding an aftermarket part that fits, installing it, and hoping no one notices. On a standard interior door, this saves money. On a fire-rated door, it voids the UL listing, creates an NFPA 80 deficiency, and exposes the building owner to the full legal consequence of a fire door that fails to perform during an actual fire. The correct path is identifying the exact OEM part, ordering it from an authorized source, and documenting the repair. This guide covers both paths so you know which one your specific situation requires.

Browse OEM replacement parts at SecurityParts.com: LCN 4040XP door closer replacement parts, Von Duprin 98/99 Series exit device replacement parts, Schlage ND Series cylindrical lock replacement parts, Schlage L Series mortise lock replacement parts, Von Duprin complete parts catalog, and the complete Allegion OEM parts catalog.

OEM vs Aftermarket: The Fire Door Listing Consequence

The OEM vs aftermarket decision is simple on non-fire-rated doors: the cost, availability, and fit of the replacement part are the determining factors. On fire-rated doors, there is a third factor that overrides the other two: listing compliance.

A fire door assembly is rated as a complete tested system. The UL (or Intertek/WHI, or other NRTL) listing covers the door, the frame, and the hardware as an integrated assembly. Replacing any component with a non-listed aftermarket alternative introduces a part that was not present in the tested assembly. NFPA 80 states directly: installing non-listed hardware on a fire-rated assembly voids the assembly's compliance.

NFPA 80 Annex A, Section A.5.2.3.6.2(11) specifically addresses this scenario, stating that aftermarket devices intended to alter the function and operation of door hardware could violate the listing and degrade the fire protection performance of the doorway. Annex A further notes that manufacturers and listing agencies should be consulted prior to making any modifications or adding any devices to fire doors.

OEM Replacement Parts (Correct for Fire Doors)

Listed status: OEM parts from Allegion (Schlage, Von Duprin, LCN) are listed and labeled as part of the original fire door assembly specification. Replacing a listed component with the same OEM part maintains the listing.

Fire door compliance: The fire door assembly listing remains intact. NFPA 80 annual inspection passes the hardware component with no deficiency noted.

Warranty: The LCN 4040XP 30-year mechanical warranty is maintained. Von Duprin and Schlage warranties apply to OEM parts from authorized distributors.

Availability: SecurityParts.com ships same-day from US warehouses for all stocked Allegion OEM parts.

Aftermarket Parts (Use on Non-Fire-Rated Doors Only)

Listed status: Aftermarket parts do not carry the same listing as the original fire door assembly component. Installing them on a fire door introduces a non-listed component into a listed assembly.

Fire door consequence: Voids the UL assembly listing. During NFPA 80 annual inspection, the non-listed hardware generates a deficiency citation. Correction requires replacing with listed OEM hardware before the building passes.

Warranty: No manufacturer warranty. Performance may differ from OEM specification in ways that affect latching or closing behavior.

Cost fallacy: The $15 savings on a spring or seal is eliminated by the inspection citation cost, the OEM replacement cost after the citation, and the reinspection fee.

The aftermarket magnetic strike overlay that NFPA 80 Annex A specifically cites: One of the specific examples called out in NFPA 80 Annex A is magnetic strips marketed to apply over strike plates for quick school lockdowns. These products are sold as security supplements, but NFPA 80 explicitly identifies them as aftermarket devices that could directly defeat the purpose of the latching mechanism by holding the door in an apparent closed position without positive latch engagement. Installing any surface-applied device on a fire door that was not part of the original listed assembly creates an Annex A violation, regardless of the security intent behind the installation.

How to Identify Your Hardware: Parts ID Guide by Product

LCN Door Closer: Model and Date Code Location

For all LCN mechanical door closers, the series or model name is on the cylinder body, typically labeled or stamped on the housing surface. The date of manufacture (month and year) is stamped near the packing nut at the base of the pinion, which is the connection point where the closer arm attaches to the closer body. Look at the top or side of the closer body at the arm connection point. The date code is a two-digit month followed by a two-digit year. For spring tube products, the label is on the cylinder. The 4040XP includes a QR code on the product that links directly to LCN's replacement parts resource page. For automatic operators, the label has the date of manufacture. Browse LCN 4040XP replacement parts by date code range at Security Parts.

Von Duprin Exit Device: Series Identification Without Disassembly

Von Duprin's name is imprinted on the product body without requiring disassembly. The series number (98, 99, 33A, 22, etc.) is typically visible on the exit device case or push bar. Key identification points: the 98 Series is non-fire-rated (panic hardware only, UL 305); the 99 Series is fire exit hardware (UL 305 and UL 10C listed). The trim model number is stamped on the back of the trim escutcheon plate (typically 990 for standard 98/99 Series trim). Trim stanchions from the 99 Series line up with the 99 device mounting studs; trim from different series does not interchange. For older devices, the series number may be less visible: if the Von Duprin name is present but the series is unclear, the dogging function is a key indicator: a mechanical dogging function indicates 98 Series; absence of mechanical dogging indicates 99 Series fire exit hardware. Browse Von Duprin 98/99 Series replacement parts catalog at Security Parts.

Schlage ND Series Cylindrical Lock: Function Code and Cylinder Identification

The Schlage ND Series lock function is identified by a two-digit code on the lock case label, accessible from the edge of the door when the door is open. The function code identifies what the lock does: ND53 = office function, ND75/ND78 = classroom security, ND10 = passage, etc. The cylinder type (conventional, SFIC, FSIC) and keyway are identified separately. The lever style designation (e.g., RHO, SPA, ATH) appears in the full catalog number. Browse Schlage ND Series cylindrical lock replacement parts at Security Parts.

Schlage L Series Mortise Lock: Function and Series Identification

The Schlage L Series mortise lock function is identified by a four-digit code on the case label accessible from the edge of the door. L9000 Series is the standard commercial mortise lock. L9080 is the standard office function; L9010 is passage; L9020 is privacy. The case label also shows the cylinder type and handing. Trim style (lever or knob) and cylinder type (conventional, SFIC, FSIC) are separate components. Browse Schlage L Series mortise lock replacement parts at Security Parts.

How to Communicate Hardware Information for Parts Ordering

When contacting SecurityParts.com for parts identification support, the most useful information to provide: the brand name visible on the product, the series or model number if visible, the finish code (US26D, US10B, US32D, etc.), the approximate installation date if known, a description of the failure mode (specific symptom, not just "it's broken"), and a photo of the product if the part number is not visible. The SecurityParts.com team at 845-935-0301 can identify the correct OEM part from this information and confirm availability for same-day shipment. Browse contact and parts identification support.

Common Failure Modes by Hardware Type

Door Closer Failures

LCN 4040XP, 4000 Series, concealed closers

Oil leaking from closer body

Hydraulic seal failure. The closer body surface shows an oil film. Do not adjust valves: the closer will continue to deteriorate until the hydraulic fluid level drops too low to maintain consistent speed. Replace the closer. Adding oil to a sealed hydraulic closer body is not an appropriate repair and voids the Allegion warranty.

Door slams on closing

Latch speed valve (L valve) set too fast, or sweep speed valve (S valve) too fast. Adjust the L valve clockwise (one turn at a time, testing after each adjustment). For slamming from the full-open position, adjust S valve clockwise. Both adjustments require testing through at least 10 complete door cycles after adjustment.

Door does not latch from full open

Spring power too low, or L valve set too slow. Increase spring size one step using the green dial. If the L valve is set counterclockwise past center, turn it clockwise. If increasing spring size produces ADA opening force violation on an accessible route, a heavier spring with a slower sweep speed may resolve the conflict.

Closer arm droops or wobbles

Arm fastener loose or spindle worn. Tighten arm nut. If spindle is worn (visible as movement in the arm connection independent of fastener tightness), closer cylinder replacement is required.

Exit Device Failures

Von Duprin 98/99 Series, 33A, 22 Series

Latch does not return after push bar released

Latch return spring is worn or broken. This is the most commonly replaced internal component on Von Duprin 98/99 Series devices. OEM latch return spring kits are available at SecurityParts.com. The spring can be replaced without removing the entire device from the door in most cases.

Push bar loose or excessive play

Push bar pivot fasteners are loose, or pivot points are worn. Tighten fasteners first. If play remains after tightening, the pivot assembly is worn and the push bar assembly needs replacement.

Latch does not retract fully on push bar

Connecting linkage between push bar and latch is worn, misaligned, or has debris accumulation in the mechanism. Inspect the connecting mechanism. Clean and lubricate pivot points with dry lubricant. If linkage components are worn, replace with OEM linkage parts.

Trim misaligned with device case

Trim stanchions not aligning with device case mounting studs. Verify that the trim series matches the exit device series (990-series trim is for 98/99 devices). Different series trims are not interchangeable. If series matches and alignment is off, the device case may have shifted on the door; re-mount the device case.

Cylindrical Lock Failures

Schlage ND Series, AL Series

Lever droops below horizontal at rest

Lever return spring is worn or the spindle connection is loose. Check the spindle connection first: tighten the through-bolt. If lever still droops after tightening, the lever return spring inside the lock case is worn. OEM lever return springs are available for Schlage ND Series locks at Security Parts.

Cylinder stiff to turn

Cylinder plug binding from worn pins, incorrect key profile (worn key), or debris in cylinder. Lubricate cylinder plug with graphite powder or dry PTFE only: do not use oil in cylinder plugs. If lubrication does not resolve, the cylinder may need repinning or replacement.

Latch does not retract with lever operation

Spindle connection between lever and latch bolt retractor is broken or worn. The spindle is a separate component in most Schlage ND Series locks. Check for spindle fracture or extreme wear at the connection point.

Latch bolt does not extend fully or spring-back weak

Latch bolt spring is worn. The latch bolt spring is inside the lock case. Schlage ND Series latch bolt spring kits are available at SecurityParts.

Hinge Failures

Standard weight and heavy weight commercial hinges

Door sags: excessive clearance at top latch side

Hinge bearing wear allowing the door to sag. Check for vertical movement at the free corner of the door when lifted gently. If more than 1/16 inch of movement, hinge bearings are worn. Tighten hinge screws first. If screws are stripped, use Heli-coil inserts or longer screws. If bearing wear is confirmed, replace hinges.

Squeaking when door is opened

Hinge pin and knuckle bearings are dry. Apply light machine oil sparingly to the pin. Do not apply oil to bearing balls on ball-bearing hinges: wipe the knuckle with an oiled cloth and allow it to work into the bearing.

Hinge pin removal (security vulnerability)

If a door opens outward (push side of door accessible from outside) and has standard hinges without NRP (non-removable pin) or TIP (tip-set screw) feature, a person outside the building can drive the hinge pin out and remove the door without operating the lock. Replace with NRP hinges on all outswing exterior doors that have not already been specified with this feature.

Repair vs Replace: The Decision Framework

Symptom or Condition	Action	Reason
Door closer: oil leaking from body	Replace	Hydraulic seal failure; progressive deterioration; no external repair
Door closer: slamming or not latching	Adjust	Valve settings; no parts needed; test after each adjustment
Door closer: arm drooping after tightening	Replace cylinder	Spindle wear; individual arm replacement does not fix spindle
Exit device: latch not returning	Replace spring	Latch return spring is maintainable wear item; OEM spring kit available
Exit device: push bar loose after tightening	Replace push bar assembly	Pivot point wear; individual fastener tightening does not fix worn pivot
Cylindrical lock: lever droops after tightening spindle	Replace return spring	Lever return spring is maintainable wear item; OEM spring available
Cylindrical lock: cylinder stiff after lubrication	Repin or replace cylinder	Pin wear beyond lubrication correction; cylinder replacement usually faster than repinning
Any hardware on fire-rated door: non-listed aftermarket part installed	Replace with OEM immediately	Non-listed hardware voids UL assembly listing; NFPA 80 inspection citation
Hardware within 30-year warranty period (LCN 4040XP)	Contact Allegion warranty	Warranty covers mechanical defects; replacement under warranty costs less than out-of-pocket replacement
Grade 2 or 3 hardware in high-traffic application	Replace with Grade 1	Under-specified hardware; individual repair does not address the grade mismatch

When Same-Day OEM Parts Availability Changes the Decision

The most common reason facilities managers install aftermarket parts on fire-rated doors is availability: the OEM part is not immediately available from local sources, the door needs to operate today, and the aftermarket part is on the shelf at the local hardware store. This is the availability gap that SecurityParts.com's same-day shipping directly addresses.

When the OEM replacement part ships same day and arrives next day, the availability argument for aftermarket parts disappears. There is no longer a choice between "aftermarket part today" and "OEM part in three weeks." The choice is between "aftermarket part today that voids the fire door listing" and "OEM part tomorrow that maintains the listing." Same-day shipping from SecurityParts.com's US warehouses makes the correct OEM choice the practical choice, not just the compliant one.

How to reach the SecurityParts.com team for urgent OEM parts identification: Call 845-935-0301 with the brand name, visible model or series number, and finish code of the hardware needing parts. Same-day shipment is available on all stocked parts for orders placed before the daily shipping cutoff. For fire-rated door hardware where the NFPA 80 compliance of the replacement part matters, specify that it is for a fire-rated opening when ordering: this confirmation ensures the correct listed version of the part is shipped rather than a standard version that may not carry the fire listing. Browse the complete Allegion OEM parts catalog at Security Parts.

Why Choose Security Parts for OEM Replacement Parts

NFPA 80 Annex A aftermarket citation language documented, LCN date code location, same-day OEM availability eliminating the aftermarket availability argument, and 30-year warranty support.

NFPA 80 Annex A Citation

We document the specific NFPA 80 Annex A language citing aftermarket devices as potential listing violations, including the specific example of magnetic strike overlays. This is the code basis for why non-listed aftermarket parts create inspection citations, explained at the parts-ordering level.

LCN Date Code Location

We document the exact location of the LCN closer date code (near the packing nut at the pinion base) so facilities managers can identify date of manufacture for warranty claims and correct part ordering without disassembling the closer.

Same-Day OEM Availability

Same-day shipping from US warehouses makes OEM parts arrive next-day, eliminating the availability argument for aftermarket parts on fire-rated doors. The OEM choice is no longer a 3-week wait: it is a next-day delivery.

Warranty Documentation

The LCN 4040XP 30-year mechanical warranty applies to OEM parts from authorized distributors. Call 845-935-0301 or the contact page for warranty-supported replacement support.

What Makes SecurityParts Different for OEM Replacement Parts

We document the specific NFPA 80 Annex A language (Section A.5.2.3.6.2(11)) that identifies aftermarket devices as potential fire door listing violations, and cite the specific example of magnetic strike overlays that NFPA 80 itself calls out. This is the code basis for why aftermarket parts on fire-rated doors create inspection citations, not just a general preference for OEM.
We document the exact location of the LCN door closer date of manufacture code: near the packing nut at the base of the pinion where the arm attaches, encoded as a two-digit month and two-digit year. This allows facilities managers to identify date of manufacture for the 30-year warranty without calling technical support or disassembling the closer.
We document the Von Duprin 98 vs 99 Series field identification: the 98 Series has mechanical dogging capability; the 99 Series does not because fire exit hardware must positively latch at all times. If a device installed on a fire-rated door has mechanical dogging, it may be a non-compliant 98 Series on a fire door application.
We document the same-day OEM shipping solution to the availability argument for aftermarket parts: when OEM parts ship same-day and arrive next-day, there is no longer a practical reason to install an aftermarket part that voids the fire door listing today vs waiting for the correct OEM part.
We carry LCN 4040XP OEM closer parts, Von Duprin 98/99 OEM exit device parts, Schlage ND Series OEM lock parts, and Schlage L Series OEM mortise lock parts as authorized Allegion OEM parts.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Commercial Door Hardware Replacement and Repair

What happens if aftermarket parts are used on a fire-rated door assembly?

Installing non-listed aftermarket hardware on a fire-rated door assembly voids the UL listing. NFPA 80 Annex A Section A.5.2.3.6.2(11) specifically identifies aftermarket devices as potential listing violations that could degrade fire protection performance. During NFPA 80 annual inspection, non-listed replacement hardware generates a deficiency citation requiring correction before the building passes. Correction requires replacing the aftermarket part with a listed OEM component, documenting the change, and submitting for re-inspection. Repeated violations can result in fines and occupancy restrictions. The $15 saved on an aftermarket part creates correction costs that far exceed the original saving.

How do I find the model number on an LCN door closer?

For LCN mechanical closers, the series or model name is on the cylinder body (labeled or stamped). The date of manufacture is stamped near the packing nut at the base of the pinion (where the arm attaches to the closer body). The date code is a two-digit month followed by a two-digit year. For spring tube products the label is on the cylinder. The LCN 4040XP includes a QR code linking directly to LCN's replacement parts resource. Contact SecurityParts.com at 845-935-0301 with the visible information for same-day parts identification and shipping.

How do I identify whether I have a Von Duprin 98 or 99 Series exit device?

The Von Duprin name is imprinted on the product body without disassembly. The series number (98 or 99) is typically visible on the case or push bar. The key functional difference: 98 Series devices can be mechanically dogged (panic hardware only, UL 305); 99 Series devices cannot be mechanically dogged because they are fire exit hardware (UL 305 and UL 10C) and fire doors must positively latch at all times. If a device on a fire-rated door has mechanical dogging capability, it may be a non-compliant 98 Series in a fire door application that should be a 99 Series.

What are the most common door closer failure modes and how do I diagnose them?

Four most common: (1) Oil leaking from closer body: seal failure, replace the closer. (2) Door slams: latch speed (L) valve too fast, adjust clockwise one turn at a time and test. (3) Door does not latch: spring power too low or L valve too slow, increase spring size one step or adjust L valve counterclockwise. (4) Arm droops after tightening: spindle wear, replace closer cylinder. Never add oil to a sealed hydraulic closer body.

What are the most common exit device failure modes and how do I fix them?

Four most common Von Duprin 98/99 failures: (1) Latch does not return: latch return spring worn, replace with OEM spring kit from SecurityParts.com. (2) Push bar loose after tightening: pivot points worn, replace push bar assembly. (3) Latch does not retract fully: linkage worn or misaligned, clean and lubricate or replace linkage parts. (4) Trim misaligned: verify trim series matches exit device series (990-series trim is for 98/99 devices only; not interchangeable across series).

When should commercial door hardware be repaired versus replaced entirely?

Repair when: the failure is a specific component (spring, seal, pivot) and the body is intact; OEM parts cost less than 40-50 percent of a new device; the device is within warranty. Replace entirely when: oil is leaking from a closer body (seal failure, progressive); the device body is physically damaged; the hardware is Grade 2 or 3 in a high-traffic application; non-listed hardware on a fire-rated opening requires replacement with OEM regardless of function. The 30-year LCN 4040XP mechanical warranty covers many failure modes on closers under 30 years old.

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Falcon T Series Cylindrical Lock Parts: Chassis, Levers, Functions, and OEM Replacements Monday, August 17, 2026

The Falcon T Series cylindrical lock is the extra heavy-duty Grade 1 choice for institutional buildings, high-traffic corridors, and any opening where a standard Grade 1 lock is not enough. When searching for "Schlage T Series cylindrical lock parts," the product you are looking for is the Falcon T Series. Falcon and Schlage share the Allegion parent company and are commonly specified together in the same building, which is why the two names get used interchangeably in the field. The T Series is Falcon's product, and its parts are organized at SecurityParts.com under the Falcon T Series parts catalog.

This guide covers every replaceable component in the Falcon T Series, the function codes that determine which chassis to order, and the features that make the T Series distinct from the Schlage ND and ALX Series that share the same buildings.

Quick Answer

The Falcon T Series is an extra heavy-duty ANSI/BHMA A156.2 Series 4000, Grade 1 cylindrical lock. It is the Falcon-branded equivalent to the Schlage ND Series in terms of market position, but it has a distinct chassis design, lever attachment system, and cylinder compatibility model.
The T Series accepts any manufacturer's cylinder without modification, including Schlage SFIC, Arrow, Best, and IC cores. This makes it the preferred choice for buildings with mixed key systems.
The function code determines the chassis. T101, T291, T301, T351, T381, T411, T501, T511, T521, T561, and T581 are all distinct chassis assemblies. Ordering by appearance rather than function code is the primary source of wrong-part returns.
The Pressure Release lever rotation is a built-in T Series feature that allows the lever to rotate freely when subjected to excessive force, protecting the internal chassis from the damage that breaks standard lever attachments.
All OEM chassis, lever, latch, and trim parts are stocked at SecurityParts.com. Browse the full T Series parts catalog.

What Makes the Falcon T Series Different From Other Grade 1 Cylindrical Locks

Every Grade 1 cylindrical lock passes the same ANSI/BHMA testing threshold. What separates them is how they are built to exceed that threshold and what that means for parts ordering and field service.

The Falcon T Series is built specifically for abuse-resistant, high-traffic institutional applications. Three design features define it:

Pressure Release Lever Rotation

Standard cylindrical lock levers are rigidly attached to the trim chassis. When someone applies excessive downward or upward force to a locked lever, that force transfers directly into the internal mechanism and causes chassis failure. The Falcon T Series uses Pressure Release lever rotation as standard on every unit. The lever rotates freely under excessive force instead of transmitting it to the chassis. This is not a field-installed option. It is designed into the product and requires no separate part to activate.

From a parts standpoint, Pressure Release matters because it significantly extends chassis life on high-abuse openings. When a T Series chassis fails on a properly installed unit, the failure mode is usually high-cycle wear in the latch mechanism or the cylinder, not lever-force damage to the chassis itself.

Universal Cylinder Acceptance

The T Series is built to accept any manufacturer's cylinder without modification. The standard configuration comes with Falcon's G keyway cylinder. Field conversion to a different cylinder brand or format does not require a special prep or core driver.

This matters directly for parts ordering on IC (interchangeable core) installations. The T Series accepts Schlage SFIC and FSIC, Arrow (including Flex Core), Best (PKS and Peaks), InstaKey, Kaba Peaks, Keymark, and KSP cores interchangeably. On a building that mixes T Series locks with Schlage ND Series hardware, the same key system can run across both products without adapter hardware.

Extra Heavy-Duty Construction

The T Series withstands torque loads that exceed the Grade 1 test standard. Levers are solid pressure-cast zinc finished to match mating parts. Roses are wrought brass or bronze installed over steel through-bolted rose inserts. The compression spring design behind the cylinder virtually eliminates lever sag in normal service, which means the spring cage - the highest-wear component on Schlage ND and ALX Series units - rarely fails on T Series locks in properly maintained installations.

Falcon T Series Function Codes and Chassis Part Numbers

Falcon T Series T351/T561 Chassis Assembly (A30758-000-00). Standard 6-pin prep. OEM replacement at SecurityParts.com.

The function code printed on the T Series lock body determines the chassis assembly. Every chassis is function-specific and cannot be substituted across function designations. The list below maps each Falcon T Series function code to its ANSI description and chassis part number.

T101 - Passage/Closet: Lever always unlocked from both sides. No key function. Chassis: A30761-000-00
T291 / T301 - Non-Keyed functions: Non-keyed configurations sharing the same chassis. Chassis: A30765-000-00
T351 / T561 - Storeroom / Classroom: Outside lever locked; inside lever always free egress. For T351 standard prep and T561 IC prep. Chassis: A30758-000-00 (standard) / A30758-001-00 (IC prep)
T381 - Dormitory / Exit: Passage from inside. Outside lever controlled by key or button. Chassis: A30767-000-00 / A30767-001-00
T411 - Entry / Office: Outside lever controlled by thumbturn inside or key outside. Chassis: A30769-000-00 / A30769-001-00
T501 - Asylum / Communicating: Both levers controlled by key from outside. Chassis: A30773-000-00 / A30773-001-00
T511 - Entrance / Apartment: Outside lever keyed; inside lever free. IC-compatible prep available. Chassis: A30756-000-00 / A30756-001-00
T521 - Classroom Security: Outside lever locked; inside lever locked; key controls from outside only. Chassis: A30748-000-00 / A30748-001-00
T581 - Storeroom Electrified / Fail-Safe: Electrified function with fail-safe release. Chassis: A30760-000-00 / A30760-001-00

The "-001-00" suffix on chassis part numbers indicates the IC (interchangeable core) prep version. Always confirm whether the installed lock runs standard cylinders or IC cores before ordering a chassis replacement.

For a broader comparison of how function codes work across cylindrical lock series, see the cylindrical lock parts guide.

Falcon T Series Lever Styles and Trim Parts

Falcon T Series Avalon Closed Lever (030740-000). One of seven lever styles available for the T Series. OEM replacement at SecurityParts.com.

The Falcon T Series is available in seven lever styles. Each lever style comes in two configurations: closed (no return, solid profile) and open (returns to door, with space below the lever). The lever style is a trim-level selection and does not affect the chassis or function code.

Avalon: Closed (030740-000) / Open (030740-001)
Boardwalk: Closed (Q330-430-BRK) / Open (Q330-431-BRK)
Broadway: Closed (Q330-430-BRW) / Open (Q330-431-BRW)
Dane: Closed (030742-000) / Open (030742-001)
Latitude: Outside Closed (Q330-430-LAT) / Open Exterior (Q330-431-LAT)
Longitude: Closed (Q330-430-LON) / Open (Q330-431-LON)
Quantum: Closed (030744-000)

When replacing a lever, always confirm both the lever style and the open/closed designation from the installed hardware. Closed and open levers are not interchangeable on the same door without also replacing the rose and the associated trim components.

Levers With Abrasive Coating

All Falcon T Series lever styles are available with an abrasive coating along the length of the lever. This coating is a tactile indicator for the visually impaired, identifying entrances to hazardous areas. If the installed lever has an abrasive surface, order the abrasive-coat variant to match. Mixing standard and abrasive-coat levers on a double door pair creates a compliance gap.

Latch, Strike, and Ancillary Parts

The T Series latch and strike components are standardized across function codes. Latch selection depends on door material and fire rating requirements, not on the function code of the lock.

Latch Assembly Options

14-010: 1-1/8" x 2-1/4" square corner spring latch - standard non-fire-rated applications
13-247: Square corner spring deadlatch - storeroom and higher-security functions
14-028: 1-1/8" x 2-1/4" square corner spring deadlatch - alternative deadlatch configuration
14-042: Anti-friction fire door latch - required on fire-rated door assemblies
39-030: Rabbeted latch and strike kit for rabbeted frame applications

Falcon T Series square corner spring latch (24074387). Standard latch for non-fire-rated T Series applications. OEM part at SecurityParts.com.

On fire-rated openings, always use the anti-friction fire door latch (14-042). Standard spring latches and deadlatches do not meet the closing force requirements for fire door assemblies under NFPA 80. For fire door hardware compliance requirements, see the commercial door fire rating guide.

Strike Options

10-013-118: Square corner T-strike (1-1/8" wide)
10-013-112: Square corner T-strike (1-1/2" wide)
10-016: Square corner fire door T-strike - for fire-rated door assemblies
10-025: ANSI strike, 1-1/4" x 4-7/8", no box - standard commercial strike
K510-066: Plastic strike box
005099-000-30: ANSI dust box, 1" deep

Cylinder and Backset Parts

43-005: Backset extension link - extends the standard 2-3/4" backset to a 5" backset for specific door configurations

All latch and strike parts are available on the T Series parts catalog at SecurityParts.com. Browse the full cylindrical locks catalog for related hardware across all brands and series.

How to Identify Your T Series Model Before Ordering Parts

Ordering the wrong part on a Falcon T Series lock is almost always the result of one of three identification errors: wrong function code, wrong cylinder prep, or wrong lever configuration. This process eliminates all three.

Find the function code on the lock body. The T Series model number (e.g., T351, T521) is stamped on the mechanism body near the packing nut at the base of the spindle, where the lever arm attaches. The function code determines the chassis. Never skip this step.
Identify the cylinder format. Standard-prep locks use Falcon's G keyway cylinder or a direct-mount competitor cylinder. IC-prep locks have a housing that accepts interchangeable cores. IC-prep chassis have the "-001-00" suffix in the part number. Confirm which format is installed before ordering any chassis.
Record the lever style and open/closed designation. Compare the installed lever profile against the seven T Series lever styles. Note whether it has a return (open) or no return (closed) and whether it has an abrasive coating.
Confirm the manufacture date if available. The manufacture date is stamped near the packing nut alongside the model number. T Series locks manufactured after July 2007 use the current service manual part numbers. Call 845-935-0301 if the part number from the service manual does not match the current catalog listing.

For guidance on identifying cylindrical lock models across Schlage ND, ALX, and Falcon T Series, see the cylindrical lock parts guide.

Falcon T Series vs Schlage ND Series: What Changes for Parts Ordering

These two series are frequently installed in the same building. Understanding where they differ prevents cross-series ordering errors on shared-building service calls.

Chassis Design

The Schlage ND Series uses a six-sided spindle. The Falcon T Series uses its own distinct spindle and chassis geometry. Chassis parts from one series cannot be substituted for the other.

Spring Mechanism

The Schlage ND Series uses a spring cage assembly as a separate replaceable component. The Falcon T Series uses a compression spring behind the cylinder that eliminates most lever sag without a separate spring cage. Spring cage replacements are one of the most common service items on Schlage ND Series locks. They are not a routine service item on the T Series.

Cylinder Compatibility

The Schlage ND Series is designed specifically for Schlage cylinders (conventional, FSIC, SFIC). Other manufacturer's cylinders can be used but may require specific tailpieces. The Falcon T Series accepts any manufacturer's cylinder without modification or special tailpieces as the default design specification. This is the most meaningful difference for buildings that run mixed key systems.

Lever Attachment

The Schlage ND Series uses captured screws. The T Series uses through-bolted rose inserts with wrought brass or bronze roses. Trim components from the two series are not interchangeable even though some lever styles appear visually similar for suiting purposes.

For a full comparison of all three commercial cylindrical lock series, see the Schlage ND, ALX, and Falcon T Series cylindrical lock parts guide. For the Schlage ND Series parts catalog, see the ND Series parts page. For Schlage ALX Series parts, see the ALX Series parts page.

OEM Replacement Parts for Falcon T Series at SecurityParts.com

SecurityParts.com stocks OEM Falcon T Series parts across chassis assemblies, lever styles, latch options, strike plates, and ancillary components. All parts are organized by function code and component type on the Falcon T Series parts catalog page.

Falcon T Series T521 Chassis Assembly (A30748-000-00). Classroom security function. OEM replacement at SecurityParts.com.

Using OEM parts on the T Series matters particularly for chassis assemblies. The T Series chassis dimensions and spring tolerances are specific to Falcon's manufacturing specifications. Aftermarket substitutes may pass visual inspection but fail under the torque loads the T Series is designed to handle. For a detailed comparison of OEM versus aftermarket options for commercial cylindrical locks, see the OEM vs aftermarket commercial door hardware guide.

Common parts ship same day. For pre-order compatibility confirmation on older T Series locks or cross-generation part number questions, call 845-935-0301. The full cylindrical lock catalog, including Schlage ND, ALX, and Falcon T Series, is at securityparts.com/cylindrical-locks.

For broad Schlage commercial hardware parts across all product lines, see securityparts.com/schlage-hardware. For a complete commercial hardware overview, see the commercial security hardware guide.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Falcon, Schlage, Von Duprin, LCN, and Detex parts since 2001. All function codes, chassis part numbers, and product specifications are verified against live SecurityParts.com product pages and official Falcon T Series documentation. For T Series part identification and same-day shipping on stocked components, call 845-935-0301 or visit the SecurityParts.com contact page.

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Commercial Door Hardware for Warehouses and Industrial Buildings: Heavy-Duty Exit Devices, Closers and High-Cycle Hardware Guide Friday, August 14, 2026

Warehouses and industrial buildings demand hardware that can survive cycle counts, impact loads, and environmental conditions that would destroy standard commercial hardware within months. ANSI/BHMA A156.3 Grade 1 exit devices are required (500,000-cycle minimum), and the Von Duprin 98/99 Series is the standard specification. Door closers should be LCN 4040XP with Extra Duty Arm (EDA), certified to 10 million cycles, five times the ANSI Grade 1 standard for closers. Forklift zones require 14-gauge steel doors and welded frames; standard 18-gauge doors with KD frames will deform under repeated equipment proximity and impact. Cold storage corridors require temperature-rated hydraulic fluid. OSHA 1910.36 prohibits chaining or locking warehouse exit doors against egress during occupied hours, regardless of what was installed during construction.

A distribution center running two 12-hour shifts with 150 workers operating through a loading dock personnel door generates 300 or more door operations per day on that opening. Over a year, that is approximately 110,000 cycles. Grade 3 exit hardware is rated for 100,000 cycles under controlled laboratory conditions. The decision to specify Grade 3 hardware to save $200 on a single door generates a replacement in less than a year under that use pattern. Understanding the cycle count math before specifying is the most important cost decision in warehouse hardware selection.

Browse warehouse and industrial hardware parts at SecurityParts.com: Von Duprin 98/99 Series heavy-duty exit device parts for warehouse egress doors, LCN 4040XP EDA industrial door closer parts, Schlage ND Series Grade 1 cylindrical lock parts for warehouse interior doors, Von Duprin exit alarm parts for monitored secondary warehouse exits, and the complete Allegion industrial hardware catalog.

500,000 ANSI/BHMA A156.3 Grade 1 exit device minimum cycle count (lab conditions). Grade 2: 250,000. Grade 3: 100,000.

10 million LCN 4040XP certified cycle count: 5x the ANSI/BHMA A156.4 Grade 1 standard of 2 million cycles for door closers

14 gauge Minimum steel door gauge for forklift traffic zones, loading dock entries, and exterior personnel doors near equipment

OSHA 1910.36 Prohibits chaining or padlocking warehouse exit doors against egress during occupied hours: a common warehouse violation

Warehouse Door Hardware Zones: Four Environments, Four Specifications

Loading Dock Zone

Personnel doors, dock entries

14-gauge steel doors. Welded frames set in masonry. Von Duprin 98/99 Grade 1 exit device. LCN 4040XP EDA closer. Heavy-duty NRP hinges. Maximum cycle use: multiple shifts of workers.

Forklift Corridor Zone

Interior forklift paths

14-gauge steel doors in welded frames. Heavy-duty push/pull bars rated for forklift exhaust and vibration. Kick plates on both sides. Door guards if forklift clearance is close. No glass lites in forklift path doors.

Interior Corridor Zone

Break rooms, offices, restrooms

16-gauge steel doors. KD frames acceptable for drywall construction. Schlage ND Series storeroom or office function. Surface-mounted closer on fire-rated corridor doors. Standard Grade 1 hardware.

Cold Storage Zone

Refrigerated and freezer areas

Temperature-rated hardware. LCN 4040XP with Liquid X all-weather fluid. Stainless steel or corrosion-resistant finishes at transition zones. Specialty freezer door hardware for sub-zero applications. Anti-condensation heated door edges where required.

The Cycle Count Math: Why Grade 3 Hardware Costs More Than Grade 1 in Warehouses

ANSI/BHMA A156.3 defines three performance grades for exit devices. Grade 1 is the highest, requiring at least 500,000 operating cycles in the certification test. Grade 2 requires 250,000 cycles. Grade 3 requires 100,000 cycles. These cycle counts are performed under controlled laboratory conditions: consistent force, consistent temperature, consistent operating conditions. In a real warehouse, the cycle count to failure is lower because real-world conditions include forceful openings, door slams, cart impacts, and environmental stresses.

ANSI/BHMA A156.3 Grade Standards

Laboratory condition cycle counts

Grade 1 (Von Duprin 98/99 Series): 500,000 cycles minimum certification test.

Grade 2: 250,000 cycles. Half the Grade 1 standard. Some commercial applications.

Grade 3: 100,000 cycles. Light commercial/residential. Not appropriate for warehouse applications.

Important note: Lab cycle counts use controlled force. Real-world cycle life in high-impact warehouse environments is lower. Specify Grade 1 as a minimum and expect shorter replacement intervals than the lab number suggests for high-abuse applications.

LCN 4040XP vs ANSI Grade 1 Closer Standard

Closers: A156.4 vs 4040XP certification

ANSI/BHMA A156.4 Grade 1 closer standard: 2 million cycles minimum.

LCN 4040XP certified cycle count: 10 million cycles. Five times the Grade 1 standard.

EDA arm advantage: Standard 4040XP includes aluminum arms. EDA (Extra Duty Arm) adds solid forged steel main and forearm, preventing the arm-bending deformation that eventually prevents a closer from fully closing a door in high-force applications.

Browse LCN 4040XP EDA door closer parts at Security Parts.

The 5-year ownership cost calculation that justifies Grade 1 hardware over Grade 2 in warehouses: A loading dock personnel door in a two-shift warehouse operation generates approximately 300 cycles per day. Over 5 years that is approximately 550,000 cycles. A Grade 2 exit device rated at 250,000 cycles in lab conditions will need replacement in fewer than 3 years at this use rate, before accounting for the higher real-world force applied in a loading dock environment. A Grade 1 device rated at 500,000 cycles is likely to last the full 5 years under the same conditions. The initial cost difference between a Grade 2 and Grade 1 Von Duprin exit device is typically $50 to $100 per opening. The cost of a service call plus a new device at year 3 is typically $300 to $500. The 5-year total cost of ownership strongly favors Grade 1 specification for every warehouse egress door, regardless of the upfront cost difference.

Door and Frame Selection for Forklift Impact Zones

Door Gauge Selection

Location	Recommended Gauge	18 Gauge	16 Gauge	14 Gauge
Office areas within warehouse	16 gauge	Acceptable	Recommended	Optional (overkill)
Break rooms, restrooms, interior corridors	16 gauge	Acceptable in low-traffic areas	Recommended	Acceptable
Forklift corridors (moderate exposure)	14 gauge	Not suitable	Minimum acceptable	Recommended
Loading dock personnel doors	14 gauge	Not suitable	Not recommended	Required
Exterior equipment zone doors	14 gauge	Not suitable	Not recommended	Required

Welded vs Knocked-Down Frames

Welded frames provide the highest structural integrity for warehouse openings. Factory-welded corner joints resist racking and deflection from equipment impacts. The frame remains rigid as a one-piece assembly even after repeated equipment proximity, door slam cycles, and decades of thermal cycling in a warehouse environment. Welded frames are the correct specification for all loading dock entries, exterior openings, forklift corridor doors, and any location subject to equipment proximity.

Knocked-down (KD) frames are field-assembled and acceptable for interior drywall partitions in office areas, break rooms, and restrooms within warehouse buildings. They are not suitable for high-impact zones, masonry wall openings, or exterior applications where the assembled joints will be stressed by equipment proximity and temperature cycling.

The frame racking failure that no one notices until the door stops closing: A KD frame in a forklift corridor experiences repeated minor impacts from forklift exhaust pressure, air disturbance, and vibration as equipment passes near the door. Each impact applies a small racking force to the assembled KD frame joints. Over time, the joints deflect enough that the door no longer swings in a true plane: one corner of the door frame pulls out of square, causing the door to bind at one corner or gap at the opposite corner. The door may still open and close but stops latching reliably. This is not hardware failure: it is frame distortion from under-specified frame construction. Replacing the latch or strike does not fix it. Replacing the KD frame with a welded frame does.

Exit Device Specification for Warehouse Egress Doors

The Von Duprin 98/99 Series is the standard heavy-duty exit device specification for warehouse and industrial applications. Its durability comes from the same product design that serves high-cycle institutional buildings: a cast steel housing, forged steel push pad, and the operating mechanism that over a century of product development has made it the global reference standard for push bar exit devices.

Why Rim Devices Are Standard for Most Warehouse Single Doors

Rim exit devices are the most common warehouse specification for single-door openings. They mount on the door face without mortise preparation and provide a complete latch and push bar assembly in a single unit. Rim devices are faster to install, easier to service, and more resistant to the door-edge damage that can compromise a mortise exit device in a high-impact environment. Browse Von Duprin 98/99 rim exit device parts at SecurityParts.

Vertical Rod Devices for Double-Door Openings

Double-door openings in warehouse shipping areas (loading dock paired doors, staging area double entries) require surface vertical rod (SVR) or concealed vertical rod (CVR) exit devices that engage locking points at both the top and bottom of the door. The vertical rod mechanism provides the full-door engagement needed on wider, heavier warehouse door pairs. Browse Von Duprin vertical rod exit device parts at SecurityParts.

Exit Alarms for Monitored Secondary Exits

Warehouse secondary exits (shipping yard exits, dock side doors not staffed at all hours) are targets for merchandise theft and unauthorized entry during break periods. Von Duprin exit alarm devices sound immediately when the push bar is operated, alerting supervisors to any unauthorized use. Browse Von Duprin exit alarm parts for warehouse secondary exit monitoring at SecurityParts.

Cold Storage and Freezer Room Hardware

Cold storage corridors and freezer room doors in warehouse facilities present two hardware challenges that standard commercial hardware cannot address: hydraulic fluid viscosity changes with temperature, and condensation-driven corrosion at temperature transition zones.

Hydraulic Closer Fluid and Temperature

Standard hydraulic door closer fluid thickens as temperature drops, causing the closer to close more slowly, generate more opening force resistance, and in cold enough conditions fail to produce sufficient force to latch the door. The LCN 4040XP uses Liquid X all-weather hydraulic fluid specifically formulated to maintain more consistent viscosity across a wider temperature range than standard closer fluid. For warehouse cold storage corridors where the ambient temperature drops but does not reach sub-zero, the 4040XP with Liquid X provides significantly more reliable performance than a standard commercial closer without temperature-rated fluid.

For freezer rooms operating at temperatures below minus 10 degrees Fahrenheit, specialty hardware rated for sub-zero operation is required. Standard commercial hardware (including the 4040XP) is not rated for continuous sub-zero operation. Consult SecurityParts.com for specialty cold chain hardware requirements for below-zero freezer room applications.

Corrosion at Cold Storage Transition Zones

The transition zone between an ambient-temperature warehouse and a refrigerated storage area generates condensation on hardware surfaces. Moisture condenses on metal hardware when the hardware surface temperature is below the dew point of the ambient air. Repeated condensation and drying cycles accelerate corrosion on standard steel hardware finishes. Stainless steel hardware or hardware with corrosion-resistant powder coat finishes is the correct specification for all hardware in cold storage transition zones, regardless of the indoor environment designation. Browse LCN 4040XP door closer parts with Liquid X temperature-rated fluid at SecurityParts.

Warehouse Occupancy Separation Fire Ratings

Most warehouses contain multiple occupancy types: the primary storage or manufacturing area (classified under IBC Group S for storage or Group F for factory/industrial), plus office space, break rooms, and restrooms (classified as Group B Business). The IBC requires occupancy separations between these different use groups when they occupy the same building.

Under IBC Section 508.4 Mixed Use and Occupancy, the required fire separation between Storage (S-1 or S-2) and Business (B) occupancies is typically 1 hour in most construction types. A 1-hour separation requires 60-minute fire door assemblies in the barrier wall. In fully sprinklered buildings, some IBC editions allow reduced separation ratings for specific occupancy combinations. Always verify against the specific adopted IBC edition and the building's sprinkler status.

Common fire-rated openings in a warehouse building include: the door between the warehouse floor and the attached office suite (S to B separation), stairwell enclosure doors in multi-story distribution facilities, electrical and mechanical room doors (classified as hazardous areas requiring fire separation), and doors in fire barriers between tenant spaces in multi-tenant industrial parks.

OSHA 1910.36: Warehouse Egress Requirements That Continue After Certificate of Occupancy

OSHA 29 CFR 1910.36 governs means of egress in workplaces and applies during building operation, not just during construction. Its requirements continue after the building passes fire inspection and receives its certificate of occupancy. Three specific provisions generate the most warehouse OSHA violations:

Exit doors must remain unlocked during occupied hours. Employees must be able to exit without a key, tool, or special knowledge at all times during occupancy. A warehouse manager who padlocks or chains a fire exit during work hours to prevent theft violates OSHA 1910.36, regardless of what the door hardware was specified and approved as during construction. This is one of the most common and most preventable OSHA citations in distribution center environments.

Exit routes must be free of obstructions. Pallets, inventory, equipment, or any materials stacked in front of or immediately adjacent to an exit door obstruct the egress route. OSHA's enforcement of this provision is visual: an inspector who can see inventory blocking or narrowing the path to an exit will cite the violation.

Exit door hardware must allow single-motion egress. Adding a padlock hasp to an exit device push bar to supplement the existing hardware creates a two-operation egress requirement that violates both OSHA 1910.36 and the model building codes, regardless of security intent.

The padlocked fire exit that generates both an OSHA citation and a premises liability claim: The warehouse scenario that leads to the most severe regulatory and legal consequences is a padlocked or chained fire exit door. If a fire occurs and a worker is injured or killed while trying to exit through a chained door, the chained door is the documented negligence evidence in the wrongful death or personal injury claim. OSHA cites the violation and assesses a penalty. The injured worker's legal counsel uses the citation and the chain as the proximate cause evidence. Exit alarms and monitored exit devices are the correct security alternative to chaining: they deter unauthorized use without preventing emergency egress. Browse Von Duprin exit alarm parts as the compliant alternative to chaining warehouse exits at Security Parts.

Warehouse Door Hardware Specification Schedule

Set	Location	Door / Frame	Lock	Closer	Egress HW
W-1	Loading dock personnel door	14-gauge steel / welded frame	Schlage ND storeroom function	LCN 4040XP EDA (forged steel arm)	Von Duprin 98/99 Grade 1 rim device
W-2	Forklift corridor door (single)	14-gauge steel / welded frame	Storeroom or passage per access requirements	LCN 4040XP EDA; delayed action optional	Von Duprin 98/99 with kick plates both sides
W-3	Double door shipping entry	14-gauge steel / welded frame pairs	Active leaf: storeroom function	LCN 4040XP EDA, active leaf; coordinator	Von Duprin SVR surface vertical rod devices both leaves
W-4	Warehouse-to-office separation (fire-rated)	60-min fire rated / welded or KD per wall type	Schlage ND office or storeroom function	LCN 4040XP (required for fire door)	Standard lever; panic hardware if assembly threshold met
W-5	Secondary monitored exit	14-gauge steel / welded frame	Cylinder trim for outside re-entry	LCN 4040XP	Von Duprin 98/99 with exit alarm (EA); NRP hinges
W-6	Interior office / break room	16-gauge steel / KD frame in drywall	Schlage ND office or storeroom function	Surface closer if fire-rated; none if not	Standard lever; no panic hardware unless assembly threshold met

Contact SecurityParts.com at 845-935-0301 or the contact page for warehouse hardware specification support and OEM parts identification.

Why Choose Security Parts for Warehouse and Industrial Hardware Parts

5-year ownership cost calculation for Grade 1 vs Grade 3, KD frame racking failure mechanism, OSHA padlocked exit liability, cold storage fluid temperature effect, and same-day OEM shipping.

5-Year Ownership Cost

We document the specific cycle count math: a two-shift warehouse door at 300 cycles/day runs through Grade 3's lab rating in under a year. Grade 1 costs $50-100 more upfront and eliminates a $300-500 replacement at year 3. No competitor documents this calculation at the parts level.

KD Frame Racking Failure

We document the specific failure mode of KD frames in forklift corridors: progressive joint racking from repeated vibration and minor impacts causes frame distortion that prevents door latching, misdiagnosed as hardware failure. Replacing the latch does not fix it; replacing the KD frame with welded does.

OSHA Padlocked Exit Liability

We document the legal pathway from padlocked fire exit to OSHA citation to premises liability claim in a fire event. Exit alarms are the compliant alternative to chaining, providing security without creating criminal and civil liability.

Same-Day OEM Shipping

Von Duprin, LCN, and Schlage warehouse hardware parts ship same day from US warehouses. Call 845-935-0301 or the contact page for parts support.

What Makes Security Parts Different for Warehouse Hardware Parts

We document the 5-year ownership cost calculation for Grade 1 vs Grade 2 vs Grade 3 exit devices, showing that a two-shift warehouse door at 300 cycles per day runs through Grade 3 lab certification in under a year, and the $50-100 upfront premium for Grade 1 eliminates a $300-500 replacement service call at year 3.
We document the LCN 4040XP EDA 10-million-cycle certification in context: the ANSI/BHMA A156.4 Grade 1 standard for door closers requires 2 million cycles. The 4040XP certifies to 5 times that standard, and the EDA forged steel arm prevents the arm-bending deformation that eventually prevents lighter arms from fully closing a door in high-force industrial applications.
We document the KD frame racking failure mechanism specific to forklift corridor environments: progressive joint deflection from repeated minor vibration impacts causes frame distortion that prevents door latching, which is misdiagnosed as hardware failure and leads to repeated hardware replacement rather than frame replacement.
We document the OSHA 1910.36 padlocked exit liability pathway with its specific consequence: a chained fire exit in a workplace fire is the documented negligence evidence in the wrongful death or personal injury claim, in addition to the OSHA citation and penalty.
We carry Von Duprin 98/99 heavy-duty exit device parts, LCN 4040XP EDA closer parts, Schlage ND Grade 1 cylindrical lock parts, and exit alarm parts for the complete warehouse hardware specification.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Warehouse and Industrial Door Hardware

What ANSI grade of exit device is required for warehouse applications?

ANSI/BHMA A156.3 Grade 1 is required for warehouse egress doors. Grade 1 requires 500,000 cycles in the certification test vs Grade 2 (250,000) and Grade 3 (100,000). A warehouse with a loading dock personnel door at 300 cycles per day runs through Grade 3's certification in under a year, Grade 2 in about 2.3 years, and Grade 1 in 4.6 years, all under lab conditions. Real-world cycle life in high-force industrial environments is shorter. Grade 1 hardware is the correct specification for every warehouse egress door and provides substantially better 5-year total cost of ownership despite the higher initial price.

What is the LCN 4040XP EDA and why is it specified for warehouse doors?

The LCN 4040XP EDA (Extra Duty Arm) is certified to 10 million cycles, five times the ANSI/BHMA A156.4 Grade 1 standard of 2 million cycles for door closers. The EDA adds a solid forged steel main arm and forearm instead of the aluminum arm in the standard 4040XP, preventing the arm-bending deformation that eventually stops a lighter arm from fully closing the door under repeated high-force industrial use. For loading dock doors, forklift corridor doors, and any warehouse door operated forcefully under time pressure, the EDA arm is the correct specification.

What is the fire rating required for the separation between warehouse storage and an office area?

Under the IBC, the occupancy separation between Storage (S-1 or S-2) and Business (B) occupancies typically requires a 1-hour fire barrier in most construction types, which requires 60-minute fire door assemblies. In fully sprinklered buildings, some editions allow reduced ratings. Verify against the specific adopted IBC edition and the building's sprinkler status. All components of the fire door assembly must carry matching fire labels including the door, frame, hinges, closer, and latching hardware.

What door gauge is required for forklift traffic zones in a warehouse?

14-gauge steel doors are required for loading dock entries, forklift corridors, and exterior personnel doors near equipment zones. Standard 18-gauge doors are not suitable for these areas and will dent and deform under repeated equipment proximity and impact. 16-gauge doors are appropriate for interior office corridors, break rooms, and restrooms within the warehouse building. The heavier gauge significantly extends service life in high-impact environments and reduces the need for door replacement from structural deformation rather than hardware failure.

What door hardware is required for cold storage and freezer rooms in warehouses?

Cold storage corridors require hardware with temperature-rated hydraulic fluid. The LCN 4040XP uses Liquid X all-weather fluid that maintains more consistent viscosity across a wider temperature range than standard closer fluid, making it a better specification for refrigerated areas. For sub-zero freezer rooms (below minus 10 degrees Fahrenheit), specialty hardware rated for sub-zero operation is required. Stainless steel or corrosion-resistant hardware finishes are required in temperature transition zones where condensation repeatedly forms on hardware surfaces.

What OSHA requirements apply to egress doors in warehouses?

OSHA 29 CFR 1910.36 requires that all exit doors remain unlocked from inside during occupied hours, that exit routes be free of obstructions, and that exit door hardware allow single-motion egress. Chaining or padlocking a fire exit during occupied hours violates 1910.36 regardless of what hardware was installed during construction and regardless of the security reason. If a fire occurs with a chained exit door, the chain is the documented negligence evidence in civil litigation. Von Duprin exit alarms are the compliant alternative to chaining: they deter unauthorized use through immediate audible alarm without preventing emergency egress.

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Von Duprin 94/95 INPACT Series Exit Device Parts: Configurations, Components, and OEM Replacements Friday, August 14, 2026

The Von Duprin 94 95 series exit device parts cover one of the most specialized exit hardware lines in commercial door hardware. The 94/95 INPACT series is a recessed push pad device built for high-traffic openings where a standard protruding push bar takes repeated impact from carts, gurneys, forklifts, and foot traffic. The recessed pad sits flush with the mechanism case, reducing the contact surface and protecting the internal components from damage that would fail a standard device quickly.

Browse the full 94/95 series parts catalog at SecurityParts.com, or use this guide to identify the exact component before ordering.

Quick Answer

The Von Duprin 94 series has a smooth mechanism case; the 95 series has a grooved case. Internal components are mechanically identical and most parts interchange.
The 94/95 INPACT series comes in four configurations: CVR panic (9447/9547), CVR fire-rated (9447/9547-F), mortise panic (9475/9575), and mortise fire-rated (9475/9575-F).
The most commonly replaced components are the ratchet release kit, top and bottom latch kits, dogging assembly, and EL cable connector.
Wood door installations require a separate mounting package (part 900856). All 30 OEM parts are stocked at SecurityParts.com.

What Is the Von Duprin 94/95 INPACT Series

The 94/95 INPACT series is Von Duprin's recessed push pad exit device, designed for applications where a protruding push pad is a maintenance and durability liability. Hospitals, schools, warehouses, and manufacturing facilities specify INPACT devices on corridor doors and service entrances where carts and equipment pass through repeatedly throughout the day.

The push pad sits recessed within the mechanism case rather than projecting outward. This protects the pad from direct impact and redirects force into the case structure rather than the push pad linkage. The result is a longer service life on high-abuse openings compared to a standard protruding push bar device.

The 94/95 is certified to ANSI/BHMA A156.3 Grade 1 and tested to one million operation cycles. It carries UL 305 panic hardware listing and UL 10C fire-exit hardware listing depending on configuration.

Where the 94/95 Is Specified

The 94/95 INPACT is most common on:

Hospital corridor doors with gurney and cart traffic
School gymnasium and cafeteria exits
Warehouse and loading dock service doors
Manufacturing facility egress doors
Any opening where a protruding push bar has a history of impact damage

If you are servicing a device with a flush-mounted pad that does not protrude from the mechanism case, you are working with an INPACT device.

Von Duprin 94 vs 95 Series: The Key Difference

The only external difference between the 94 and 95 series is the mechanism case finish. The 94 series has a smooth case. The 95 series has a grooved case that provides a better grip surface in high-contact environments.

Internally, both are mechanically identical. The same latch kits, dogging assemblies, ratchet release components, and EL parts apply to both series. When ordering replacement parts, you do not need to specify 94 or 95 - the parts are the same.

When replacing outside trim, confirm whether smooth or grooved case trim is specified. For a full series comparison, see the Von Duprin exit device series comparison.

94/95 INPACT Device Configurations

The 94/95 series comes in four primary configurations. Each serves a different application and uses a different parts set for the latch assembly. Identifying the correct configuration is the first step before ordering any major replacement component.

9447/9547 Concealed Vertical Rod (CVR) Panic

The CVR configuration uses concealed vertical rods inside the door stile to drive latch bolts at the top and bottom of the door frame simultaneously. Both latches must release when the push pad is depressed. This configuration is used on double doors without a center mullion and on single doors where a rim device is not specified.

The CVR mechanism includes a top latch kit, a bottom latch kit, rods, and rod connecting hardware in addition to the push pad assembly. All are available as individual OEM parts.

9447/9547 CVR Fire-Rated (LBR/LBL)

The fire-rated CVR configuration adds an auxiliary fire latch to the bottom of the door. When the door closes during a fire event, this latch provides additional engagement with the floor strike to maintain the door's fire rating. The auxiliary fire latch components are separate from the standard bottom latch kit. The LBR designation indicates a bottom latch with right-hand application; LBL is left-hand.

Part 051860-32 is the auxiliary fire pin only kit for LBR/LBL configurations. If the fire latch is failing or the device is not meeting fire rating requirements during inspection, this component is the starting point. For fire door assembly requirements and UL listing requirements, see the commercial door fire rating guide.

9475/9575 Mortise Lock Device

Von Duprin 968939 Latchbolt Collar, specific to the 9475/9575 mortise configuration. OEM part available at SecurityParts.com.

The mortise configuration integrates the 94/95 INPACT push pad mechanism with a mortise lock chassis in the door edge. This provides the highest level of security and function range in the INPACT line. The mortise device uses a different latch assembly than the CVR configuration and includes a latchbolt collar (part 968939) that is specific to the mortise application.

9475/9575 Mortise Lock Fire-Rated

The fire-rated mortise configuration adds UL 10C fire-exit hardware compliance to the mortise device. Installation on a fire-rated opening requires the device to carry the fire-exit hardware label, which is separate from the panic hardware listing. Never substitute a panic-only device on a fire-rated opening.

Von Duprin 94/95 Series Exit Device Parts: What Each Component Does

Dogging Assembly (Dog Key, Dogging Clip, Spring)

The dogging assembly holds the latch retracted for free push-pull access on non-fire-rated openings, engaged with a 5/32-inch hex dog key.

Part 090085 - Dog Key 5/32" Hex, Package of 10
Part 090005 - Dog Key 5/32" Hex, Package of 2

Dog keys are the most frequently lost component on INPACT devices. When dogging fails to hold, inspect the dogging clip spring (part 971664) and dogging clip (part 971659) first. These components are specific to the INPACT mechanism.

Latch Kits: Top and Bottom

The CVR configuration requires both a top latch kit and a bottom latch kit. These are the latch assemblies that engage the door frame strikes at the top and bottom of the door. Each kit contains the latch bolt, latch collar, and related hardware for that position.

Part 050492 - Top Latch Kit
Part 050493 - Bottom Latch Kit
Part 050128 - Top Latch Kit (alternate configuration)
Part 050495 - Bottom Latch Kit (alternate configuration)

Confirm the correct latch kit variant from the model number on the device label. If the latch bolt is not engaging the strike consistently, inspect the latch collar and compression spring (part 090066) before replacing the full kit.

Ratchet Release Kit: What It Is and When It Fails

The ratchet release kit is unique to the INPACT series and the most commonly misdiagnosed component on a failing 94/95 device. The ratchet mechanism is what allows the recessed push pad to engage the latch retraction linkage without protruding. When the ratchet release fails, the push pad either does not retract the latch at all or requires excessive force to operate.

Part 106222 - Ratchet Release Kit
Part 090070 - Ratchet Release Screw Package of 2
Part 090069 - Ratchet Lever Spring Package of 2

The ratchet lever spring (090069) is the highest-wear component in this assembly. On high-traffic openings, this spring fatigues before the rest of the mechanism and causes the pad to feel loose or fail to fully retract the latch. Replace the spring first before ordering the full ratchet release kit (106222), which is the complete assembly for a full rebuild.

EL Electric Latch Retraction Parts

The EL option adds electric latch retraction to the 94/95 INPACT device, enabling the door to be unlatched remotely via an access control signal. The EL components are serviceable independently of the mechanical push pad assembly.

Von Duprin 110388 EL 6' Cable Connector for the 94/95 INPACT series. Available at securityparts.com.

Part 110388 - EL 6' Cable, Connector
Part 050534 - EL Potted Circuit Breaker
Part 050539 - EL Receptacle Connector
Part 050047 - Non-EL Latch Retrofit Kit (converts EL device to non-EL)
Part 050048 - Non-EL Latch Retrofit Kit (alternate configuration)

The EL cable connector (110388) is the first component to check when electric latch retraction stops responding. Connector failures are more common than circuit breaker failures. The circuit breaker (050534) requires replacement after any over-voltage event.

Rod and Linkage Components

The CVR configuration includes vertical rods that run inside the door stile from the mechanism to the top and bottom latch assemblies. The rod connecting screws secure the rod joints and are a common source of CVR failures when they loosen from repeated operation.

Part 090071 - Rod Connecting Screw Package of 2
Part 090072 - Rod Connecting Screw Package of 2 (alternate)
Part 090107 - Control Link Pin Retaining Ring, Package of 10
Part 051808 - Extension Rod Kit 10'

The extension rod kit (051808) is required on oversized doors where the standard rod length does not reach the full height of the door. Confirm the door height before ordering any rod components.

Mounting and Door Prep Parts

Part 900856 - Wood Door Mounting Package
Part 090063 - Latch Link Pin Retaining Ring, Package of 10
Part 090064 - Latch Link Pin, Package of 10
Part 090065 - Bolt Return Spring, Package of 10
Part 109324 - Latch Mounting Bracket Kit
Part 112868 - Latch Mounting Bracket Kit (alternate)

INPACT Door Preparation Requirements

The 94/95 INPACT series has specific door preparation requirements that differ from standard exit devices. Understanding these before ordering any retrofit parts prevents installation errors.

Hollow Metal Door Preparation

The INPACT device requires a factory-cut door preparation on hollow metal doors. Field-modifying a standard hollow metal door is not recommended and may void the fire rating. When replacing an existing INPACT device, the replacement installs directly into the existing preparation, provided you order the same configuration and model generation.

Wood Door Installation

Wood door installations require part 900856, the Wood Door Mounting Package. This package contains the additional hardware needed to secure the mechanism to a wood door substrate. Standard hollow metal mounting hardware is not sufficient for wood door applications.

How to Identify the Right 94/95 Part Before Ordering

The 94/95 INPACT series has model generations where part numbers differ between the 9447/9547 and 9475/9575 configurations. Follow this process before placing any order:

Read the model number from the device label. The label is on the mechanism case. The model number tells you the configuration (CVR or mortise) and the generation.
Identify the failing component by symptom. Pad not retracting = ratchet release or spring. Latch not engaging strike = latch kit or collar. EL not responding = cable connector first, then circuit breaker. Rod not driving the latch = rod connecting screw or mounting bracket.
Confirm the part number on the series page. The 94/95 series parts catalog lists all 30 stocked OEM parts. If the catalog part number matches your service manual, you have the right part.
Call 845-935-0301 for compatibility confirmation on older generations before ordering.

OEM Replacement Parts for Von Duprin 94/95 Series at SecurityParts.com

SecurityParts.com stocks 30 OEM replacement parts for the Von Duprin 94/95 INPACT series, organized by component type on the 94/95 series parts catalog page. Parts include dogging keys, retaining rings, latch kits, ratchet release components, EL cable and circuit breaker, rod hardware, mounting packages, and extension rods.

All parts are OEM. Aftermarket substitutes for INPACT devices carry significant risk of dimensional incompatibility in the ratchet mechanism and latch kits. See the OEM vs aftermarket guide for detail. Common parts ship same day. Call 845-935-0301 to confirm availability on less common configurations. The full Von Duprin catalog is at securityparts.com/von-duprin. Browse all exit device parts at SecurityParts.com.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Von Duprin, Schlage, LCN, Falcon, and Detex parts since 2001. All part numbers, series specifications, and configuration details are verified against live SecurityParts.com product pages and official Von Duprin documentation. For Von Duprin 94/95 series part identification and same-day shipping on stocked components, call 845-935-0301 or visit the SecurityParts.com contact page.

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Commercial Door Hardware for Hotels and Motels: Guest Room Locks, Communicating Doors and Panic Hardware Guide Thursday, August 13, 2026

Hotels operate across multiple occupancy types simultaneously, and the hardware requirements change floor by floor and space by space. Guest room floors are R-1 Residential occupancy: panic hardware is never required on these floors regardless of how many guests are present, because residential occupancy is not a panic-hardware-triggering occupancy type. Hotel ballrooms, meeting rooms, and restaurants are Assembly occupancy: panic hardware is required when the occupant load reaches 50 (IBC) or 100 (NFPA 101). Communicating doors between adjacent hotel rooms require 45-minute fire door assemblies in 1-hour partitions but are specifically exempted from self-closing device requirements under IBC 716.2.6 and NFPA 101, as long as they still have positive-latching hardware. The Schlage CS210 interconnected lock handles guest room entry doors with single-motion egress.

A hotel with 200 guest rooms, a ballroom, a restaurant, a pool, and a fitness center is not one building: it is four occupancy types layered on a single structure, each with distinct hardware requirements. The guest room corridor gets standard cylindrical corridor hardware. The ballroom gets Von Duprin exit devices. The communicating door between rooms 401 and 403 gets fire-rated doors without closers. Getting any one of these wrong generates inspection citations, brand standard violations, and in some cases genuine life safety failures.

Browse hotel hardware parts at SecurityParts.com: Schlage CS210 interconnected lock parts for hotel guest room entry doors, Schlage ND Series cylindrical lock parts for hotel corridor doors, Von Duprin 98/99 Series exit device parts for hotel assembly spaces, LCN door closer parts for hotel corridor and stairwell doors, and the complete Allegion hotel hardware catalog.

R-1 occupancy Hotel guest room floors: residential occupancy means panic hardware is NEVER required regardless of guest count on the floor

45 min Fire door rating required for communicating doors between hotel rooms in 1-hour fire partitions per 2021 IBC Table 716.1(2)

No closer required Communicating doors are specifically exempted from self-closing device requirements under IBC 716.2.6 Exception 1 and NFPA 101

50 vs 100 IBC panic hardware threshold (50 occupants) vs NFPA 101 threshold (100 occupants) for hotel assembly spaces: a critical difference for meeting room specification

The Hotel Hardware Challenge: Six Different Door Types in One Building

Hardware specification for a hotel must account for the full range of occupancy types within a single building. Each zone has distinct code requirements, brand standard expectations, and operational needs that cannot be served by a single hardware specification applied throughout.

Guest Room Entry Doors

R-1 residential, corridor to sleeping unit

Schlage CS210 interconnected lock (latch plus deadbolt, single-motion egress). Second security device allowance: door guard or security chain permitted under IBC/NFPA 101 residential exception. Electronic locks for key card access per brand standard.

Communicating Doors

Between adjacent sleeping units

45-minute fire door assembly in 1-hour partition. No closer required (IBC 716.2.6 Exception 1). Single-sided deadbolt with thumbturn on room side, blank plate facing other door. Active latch bolt required despite closer exemption.

Guest Floor Corridor Doors

Housekeeping, vending, laundry

Standard cylindrical or mortise locks per function. Storeroom function for housekeeping rooms. No panic hardware requirement on guest floor corridor doors. Self-closing required on fire-rated corridor doors.

Stairwell Enclosure Doors

60-min or 90-min fire rated

90-minute fire door in 2-hour enclosures. Self-closing required. Fire exit hardware on stairwells serving assembly areas at the panic threshold. Stairwell reentry hardware for buildings over 4 stories per IBC/NFPA 101.

Assembly Spaces

Ballrooms, meeting rooms, restaurants

Von Duprin exit devices required when occupant load reaches IBC threshold (50) or NFPA 101 threshold (100). Fire exit hardware on rated doors. QEL for access control between events. Exit alarms on exterior assembly exits.

Service and Back of House

Loading dock, kitchen, utility

Heavy-duty exit devices on loading dock and kitchen exits. Cylindrical storeroom function on kitchen offices. Security hinges NRP on all outswing exterior service doors. Surface-mounted closers on service corridor fire doors.

Hotel Guest Room Entry Doors: The Two-Operation Exception

Hotel guest room entry doors qualify for the same two-operation exception that applies to all residential sleeping units under IBC Section 1010.2.4(5) and NFPA 101 Section 7.2.1.5.3.4. Both codes allow one additional security device (deadbolt, night latch, door guard, or security chain) in addition to the primary latch on sleeping unit entry doors, provided the additional device is operable from inside without a key or tool.

This exception allows a hotel room door to have both a primary latch (in the lockset) and a door guard or privacy latch on the inside of the door, which is the standard hotel guest expectation. What the exception does not permit is a configuration that requires the guest to simultaneously operate both devices with two hands. The devices must be sequential, not simultaneous, for the configuration to satisfy the one-hand operability requirement of accessibility standards.

Schlage CS210 Interconnected Lock for Guest Room Entry

The CS210 is the standard specification for hotel guest room entry doors where the brand standard requires a deadbolt and latch in a single integrated hardware unit. The CS210's single inside lever rotation retracts both the latch and deadbolt simultaneously, satisfying the single-motion egress requirement from inside the room without the guest needing to operate two separate devices. From the corridor, the deadbolt requires a key (or electronic credential) to retract. Browse Schlage CS210 interconnected lock parts for hotel guest room doors at Security Parts.

Hotel Communicating Doors: The Code Requirements That Architects Get Wrong

Communicating doors between adjacent hotel sleeping rooms are one of the most frequently misspecified door types in hospitality construction. The misspecification usually goes in one of two directions: fire-rating the doors correctly but adding closers that are not required (adding cost), or omitting fire ratings because the installer thought the closer exemption also meant the fire-rating requirement was relaxed (a genuine life safety error).

How a Communicating Door Pair Works

Room 401

Thumbturn deadbolt on Room 401 side. Blank plate facing Room 403 door.

Door A (Room 401 swing)

Door B (Room 403 swing)

Room 403

Thumbturn deadbolt on Room 403 side. Blank plate facing Room 401 door.

Fire Rating Requirements

Under the 2021 IBC, walls separating sleeping rooms in hotels are fire partitions (Section 420.2 and 708.3) with a minimum 1-hour fire resistance rating. Per IBC Table 716.1(2), a 1-hour fire partition that is not part of a corridor or exit enclosure requires 45-minute fire door assemblies as opening protectives. This is the required fire rating for communicating doors in standard hotel construction. Exception: buildings of Type IIB, IIIB, or VB construction that are fully sprinklered may use 1/2-hour fire partitions, which require 20-minute fire door assemblies.

Both door leaves in the communicating pair are typically required to be fire-rated, even though the IBC does not prescriptively require both. Most AHJs take the position that using one rated door and one non-rated door in the same opening compromises the fire separation. The NFPA 101 Handbook states: "The requirement for a fire barrier separation between the rooms, therefore, necessitates the use of a fire protection-rated door assembly for at least one of the doors in any guest room-to-guest room opening." Many AHJs interpret this to require both doors rated, and the safe specification practice is to rate both unless the AHJ explicitly approves a single-rated configuration.

What IS Required

45-minute fire door assemblies (in 1-hour fire partitions) on both door leaves. Both doors must have active latch bolts providing positive latching engagement.

Single-sided deadbolt with thumbturn on the room side and a blank plate on the side facing the adjacent door. Both rooms must independently unlock their door to allow shared access.

What is NOT Required

Self-closing devices: IBC Section 716.2.6 Exception 1 specifically exempts communicating doors between sleeping units in Group R-1 from the self-closing or automatic-closing device requirement. NFPA 101 includes the same exemption. No door closer is required on communicating doors.

Emergency egress compliance: communicating doors are not required egress doors, so the single-operation egress requirement does not apply. Two-operation locking hardware (deadbolt plus latch) is acceptable.

The communicating door latch requirement that the closer exemption does NOT remove: IBC Section 716.2.6 Exception 1 exempts communicating doors from the self-closing requirement, not from the latching requirement. The communicating door must still have an active latch bolt that positively engages the strike when the door is in the closed position. A communicating door with only a security deadbolt and no latch bolt does not meet the fire door assembly requirement for positive latching, even with the closer exemption in effect. Both devices are needed: the deadbolt for guest security, and the latch bolt for fire door latching compliance. The Schlage CS210 interconnected lock with entry function provides both in a single unit, or a separate cylindrical passage latchset can be added alongside the security deadbolt.

Panic Hardware in Hotels: Where It Is and Is Not Required

The panic hardware question in hotels is one of the most frequently misunderstood topics in hospitality construction, and the misunderstanding goes both directions. Some specifications add panic hardware to guest floor corridor doors out of excessive caution. Others omit it from hotel meeting rooms that meet the assembly occupancy threshold because they assume the hotel's residential classification protects all spaces within the building. Both are wrong.

Hotel Space	Occupancy Type	IBC Panic Threshold	NFPA 101 Panic Threshold	Panic HW Required?
Guest room floor corridor	R-1 Residential	Not applicable (R-1)	Not applicable (R-1)	No, never
Hotel lobby	Assembly (if locking doors)	50+ occupants	100+ occupants	Depends on occupant load and whether doors lock
Ballroom / banquet hall	Assembly	50+ occupants	100+ occupants	Yes, if occupant load threshold met and doors lock
Meeting rooms	Assembly	50+ occupants	100+ occupants	Depends on calculated occupant load and adopted code
Restaurant / bar (separated)	Assembly	50+ occupants	100+ occupants	Depends on occupant load calculation
Pool / fitness center	Assembly	50+ occupants	100+ occupants	Depends on occupant load; pools often have panic hardware
Stairwells (all floors)	Exit enclosure	Always required if locking	Always required if locking	Fire exit hardware required on all stairwell doors

The IBC vs NFPA 101 panic hardware threshold difference that changes hotel meeting room specifications: The IBC requires panic hardware on Assembly occupancy egress doors at an occupant load of 50 or more. NFPA 101 sets that threshold at 100. A hotel meeting room with a calculated occupant load of 75 persons does not require panic hardware in a NFPA 101 jurisdiction, but does require it in an IBC jurisdiction. For hotel chains with properties in multiple states, brand standards typically specify to the more stringent threshold (IBC's 50-person threshold) to ensure consistency across all properties regardless of which code the local jurisdiction has adopted. Confirm the adopted code for each property location before finalizing the hardware specification.

Von Duprin Exit Devices for Hotel Assembly Spaces

Hotel ballrooms, banquet halls, large meeting rooms, and ground-floor restaurants that meet the panic hardware threshold require Von Duprin exit devices on all egress doors from those spaces. These are the same exit device specifications that apply to any other assembly occupancy: the hotel's residential classification on guest room floors does not carry over to the assembly spaces on the ground floor or event floor.

QEL for Event Access Control

Von Duprin QEL (Quiet Electric Latch) exit devices are specified for hotel meeting room and ballroom egress doors where the space needs to be secured between events while providing access for event setup crews and catering staff. The QEL allows the door to be locked from outside via an access control credential while keeping the push bar freely operable from inside at all times. Between events, the room is secured. During setup, authorized staff credential in. During the event, the doors remain unlocked or are set to free egress mode based on the event manager's access control programming.

Browse Von Duprin 98/99 Series and QEL exit device parts for hotel assembly spaces at Security Parts.

Hotel Hardware Specification Schedule

Set	Door Location	Lock	Closer	Egress Hardware
H-1	Guest room entry	Schlage CS210 interconnected (latch + deadbolt, single-motion egress) + electronic lock per brand standard	Surface closer (brand standard dependent)	Standard cylindrical lever; CS210 provides single-motion egress
H-2	Communicating door (each leaf)	Single-sided deadbolt (thumbturn inside, blank plate facing adjacent door) + cylindrical latch bolt	No closer required (IBC 716.2.6 Exception 1)	Not an egress door; two-operation locking permitted
H-3	Housekeeping / service rooms	Schlage ND Series storeroom function	Surface closer if fire-rated	Standard lever; no panic hardware requirement
H-4	Ballroom / meeting room egress	Von Duprin QEL for event access control integration	LCN 4040XP (self-closing required)	Von Duprin 98/99 Series exit device (panic hardware at 50+ IBC / 100+ NFPA 101)
H-5	Stairwell doors	Lever or fire exit hardware; reentry hardware if over 4 stories	LCN closer required (self-closing)	Von Duprin fire exit hardware on fire-rated stairwell doors
H-6	Loading dock / service exit	Cylinder trim; cylindrical storeroom on service offices	Surface closer	Von Duprin exit device with exit alarm (EA); NRP security hinges on outswing exterior

For parts and specification support on hotel hardware, browse Schlage ND Series cylindrical lock parts and contact SecurityParts.com at 845-935-0301 or the contact page.

Why Choose Security Parts for Hotel Door Hardware Parts

R-1 occupancy panic hardware exemption documented, communicating door latch-but-no-closer requirement, IBC vs NFPA 101 threshold difference for meeting rooms, CS210 interconnected lock, and same-day OEM shipping.

R-1 Occupancy Panic Exemption

We document the occupancy-type logic behind why guest room floors never require panic hardware: both occupant load AND triggering occupancy type must be satisfied simultaneously. R-1 residential is not a triggering type regardless of how many guests are present.

Communicating Door Latch Requirement

We document that the closer exemption on communicating doors does not remove the latching requirement. Both a security deadbolt and an active latch bolt are needed. Missing the latch bolt on a communicating door creates a fire door assembly that fails the positive latching requirement.

IBC vs NFPA 101 Threshold

We document the 50 vs 100 person panic hardware threshold difference between IBC and NFPA 101 for hotel meeting rooms. Hotel chains with multi-state properties need to understand this to set brand standards that comply everywhere.

Same-Day OEM Shipping

CS210, Von Duprin, LCN, and Schlage hotel hardware parts ship same day from US warehouses. Call 845-935-0301 or the contact page for hotel hardware support.

What Makes Security Parts Different for Hotel Hardware Parts

We document the specific occupancy-type logic behind hotel panic hardware requirements: both the occupant load threshold AND the triggering occupancy type (Assembly, Educational, High Hazard) must be simultaneously satisfied. A guest room floor with 200 guests never requires panic hardware because R-1 residential occupancy is not among the triggering types, regardless of the number of people present.
We document that the IBC 716.2.6 Exception 1 closer exemption on communicating doors does NOT remove the latching requirement. Both a security deadbolt and an active latch bolt are required on communicating doors. A communicating door with only a deadbolt and no latch bolt fails fire door positive latching requirements even though no closer is needed.
We document the IBC vs NFPA 101 panic hardware threshold difference for hotel meeting rooms (50 persons vs 100 persons) and its specific implication for multi-state hotel chains: a meeting room that does not require panic hardware under NFPA 101 does require it under the IBC, meaning brand standards set to the more stringent threshold ensure compliance across all properties.
We document the communicating door AHJ interpretation standard: while the NFPA 101 Handbook states that at least one door in the communicating pair must be fire-rated, most AHJs require both, and the safe specification practice is to rate both unless the AHJ explicitly approves a single-rated configuration.
We carry Schlage CS210 interconnected lock parts, Von Duprin exit device and QEL parts, LCN door closer parts, and Schlage ND Series cylindrical lock parts for all hotel hardware zones.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Hotel Door Hardware

Why is panic hardware not required on hotel guest room corridor doors?

Hotel guest room floors are classified as Group R-1 Residential occupancy under the IBC and as hotel/motel occupancy under NFPA 101. Panic hardware requirements apply specifically to Assembly, Educational, and High Hazard occupancies at defined occupant load thresholds. Residential occupancy is not among the triggering types regardless of the number of guests on the floor. A 200-guest hotel floor does not require panic hardware because R-1 residential fails the occupancy-type test, even though the occupant load is above the threshold. Both occupant load AND occupancy type must simultaneously trigger to create a panic hardware requirement.

What is a communicating door between hotel rooms and what hardware does it require?

A communicating door is a pair of doors in a single frame within the wall separating two adjacent sleeping rooms. The 2021 IBC requires 45-minute fire door assemblies in 1-hour fire partitions (Table 716.1(2)). Both door leaves are typically required to be fire-rated by most AHJs. Security hardware is a single-sided deadbolt with thumbturn on the room side and blank plate facing the adjacent door, requiring both guests to unlock their respective door for passage. An active latch bolt on each door is also required for positive latching compliance, even though a door closer is not required.

Why are hotel communicating doors not required to be self-closing?

IBC Section 716.2.6 Exception 1 specifically exempts communicating doors between sleeping units in Group R-1 from the self-closing or automatic-closing device requirement. NFPA 80 and NFPA 101 include the same exemption. The rationale is that when both communicating doors are simultaneously open, the two rooms function as a suite, making a fire separation unnecessary. The exemption applies only to the closer, not to the latch: communicating doors must still have active latch bolts providing positive latching when closed.

When is panic hardware required in a hotel ballroom or meeting room?

Hotel ballrooms and meeting rooms are Assembly occupancy regardless of the hotel's overall R-1 classification. IBC requires panic hardware on Assembly occupancy egress doors at 50 or more occupants. NFPA 101 sets the threshold at 100. The requirement applies only to doors equipped with a lock or latch: unlocked push/pull doors do not trigger panic hardware. Hotel meeting rooms below the threshold can use standard cylindrical hardware. Above the threshold, Von Duprin exit devices are required on all egress doors from that space.

What is the Schlage CS210 interconnected lock used for in hotels?

The CS210 is specified for hotel guest room entry doors where both a deadbolt and latch are required in a single integrated unit with single-motion egress from inside. A single rotation of the inside lever simultaneously retracts both the latch bolt and the deadbolt, satisfying egress requirements. From the corridor, key or electronic credential operation is required for entry. It is a Grade 2 product, appropriate for hotel guest room applications, and directly replaces the discontinued Schlage S200 Series on most existing installations.

What Von Duprin exit devices are specified for hotel assembly spaces?

Von Duprin 98/99 Series for standard hotel ballroom and meeting room egress doors above the panic hardware threshold. QEL (Quiet Electric Latch) for event access control: allows the room to be secured between events while providing credential-based entry for setup crews. Exit alarm (EA) versions for exterior assembly exits and service exits where unauthorized use between events is a concern. Fire exit hardware (UL 10C listed) on any fire-rated egress door where panic hardware is required. NRP security hinges on all outswing exterior exit doors from assembly spaces.

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Commercial Security Hardware Guide: Types, Functions, and OEM Replacement Parts Thursday, August 13, 2026

Every commercial building relies on a coordinated system of commercial security hardware to control access, protect occupants, and meet code requirements. When one component fails, it affects the entire opening. Understanding what each type of hardware does, how the pieces work together, and where to find the right OEM replacement part is essential for facility managers, contractors, and building owners who maintain commercial properties.

This guide covers the major categories of commercial door security hardware, explains what each one does on a real opening, and connects you directly to OEM replacement parts at SecurityParts.com. For part identification and ordering reference by hardware type, see the companion security door parts guide.

Quick Answer

Commercial security hardware includes exit devices, mortise locks, cylindrical locks, door closers, electric strikes, deadbolts, and access control hardware. Each serves a distinct function on a commercial opening.
Most hardware is rated by ANSI Grade (Grade 1 = commercial/highest, Grade 2 = residential, Grade 3 = light duty). Always replace commercial hardware with the same grade or higher.
New installation and maintenance are different tasks. New installation means specifying a complete hardware package. Maintenance means identifying the exact failed component and ordering the correct OEM replacement part for the installed model.
On most commercial openings, multiple hardware categories work together: a lock controls access, an exit device handles egress, a door closer controls the swing, and an electric strike or deadbolt provides the final locking point.
SecurityParts.com stocks OEM replacement parts for Schlage, Von Duprin, LCN, Falcon, and Detex. Browse the full parts catalog.

What Is Commercial Security Hardware

Commercial security hardware refers to the mechanical and electromechanical devices installed on commercial doors to control access, provide safe egress, and meet code requirements. It is distinct from residential hardware in three ways: it is built to higher durability standards, tested to ANSI grade classifications, and required to meet life safety codes that residential hardware is not.

In a commercial building, the hardware on any single door opening may include several devices: a lock, an exit device, a door closer, a strike plate or electric strike, and in access-controlled environments, electrified hardware connected to a credential reader. Every device is interdependent. A failed door closer puts mechanical stress on the lock. A misaligned strike plate causes bolt wear. Understanding the full system prevents misdiagnosis and wrong-part orders.

ANSI Grading: The Standard That Defines Commercial Hardware

The American National Standards Institute (ANSI), in collaboration with the Builders Hardware Manufacturers Association (BHMA), sets performance grades for commercial door hardware. These grades appear on every specification sheet and every product listing.

Grade 1: The commercial standard. The highest level of durability, security, and cycle testing. Required on most exterior commercial doors and any opening subject to high daily use.
Grade 2: The residential standard. Suitable for light commercial applications and interior doors with lower traffic.
Grade 3: The minimum grade. Appropriate only for very low-use interior applications.

When replacing hardware on an existing commercial opening, always match or exceed the installed grade. Downgrading from Grade 1 to Grade 2 on a high-use door creates a performance and liability gap. For a full breakdown of ANSI/BHMA grading across all hardware categories, see the ANSI/BHMA door hardware standards guide.

Exit Devices: Commercial Egress Hardware

Von Duprin 98/99 series rim exit devices. One of the most widely installed exit device lines in commercial buildings. OEM replacement parts available at SecurityParts.com.

Exit devices, also called panic hardware or push bars, are the push-bar mechanisms installed on outswing doors that must allow emergency egress without any special knowledge or key. A single downward or horizontal push on the bar releases the door latch. This is a life-safety requirement on most commercial exit doors, codified under NFPA 101 and IBC requirements.

Exit devices are required on doors serving assembly occupancies, educational buildings, healthcare facilities, and any space with an occupant load above a set threshold defined by the local building code. They are also the most commonly maintained devices in commercial buildings because their frequency of use is high and they take significant mechanical stress.

Types of Exit Devices

Rim Exit Devices

Surface-mounted to the face of the door. The most common configuration on single exterior doors and the active leaf of double doors. Simple to service because all components are accessible without removing the device from the door. Von Duprin's 98/99 and 9800/9900 series are the industry standard.

Surface Vertical Rod (SVR) Exit Devices

Use vertical rods that run along the door surface to shoot bolts at the top and bottom of the door frame, instead of a rim strike. Used on double doors without a center mullion where rim devices on both leaves would conflict. Rods are exposed on the door surface.

Concealed Vertical Rod (CVR) Exit Devices

Operate the same way as SVR devices but the vertical rods run inside the door stile. Preferred where aesthetics matter and exposed rods are undesirable. Requires a mortised door preparation.

Mortise Exit Devices

Integrate the exit device function with a mortise lock chassis. Provide the highest security and function flexibility. Common on high-security openings where both panic egress and robust access control are required on the same door.

For replacement parts across all exit device types, see the exit devices parts guide and the Von Duprin parts catalog. For help selecting the right exit device configuration, see the panic bar selection guide.

Mortise Locks: High-Security Commercial Locksets

A mortise lock installs inside a pocket (the mortise) cut into the door edge. The entire lock chassis, including the latch, deadbolt function, and cylinder housing, is contained within the door. This design makes mortise locks significantly more resistant to forced entry than surface-mounted lock configurations.

Mortise locks are the standard on high-security commercial openings: hospital corridor doors, educational building exteriors, government facilities, and institutional buildings. The Schlage L-Series is the most widely installed Grade 1 mortise lock in North American commercial construction.

Why Mortise Locks Are Used in Commercial Buildings

The lock chassis is fully enclosed within the door, eliminating exposed fasteners that surface-mounted locks present
Supports a wide range of ANSI function codes, allowing a single platform to serve many different access control needs
Cylinders, trim, and strike plates are independently replaceable without removing the lock case from the door
Compatible with interchangeable core (IC) key systems, enabling rapid rekeying across large facilities

For mortise lock component identification and parts, see the mortise lock parts guide and the full commercial mortise locks guide. For a direct comparison between mortise and cylindrical lock platforms, see mortise locks vs cylindrical locks.

Cylindrical Locks: The Standard Commercial Lockset

Schlage ND Series commercial cylindrical locks. A Grade 1 cylindrical lockset used across offices, classrooms, and interior corridors. OEM replacement parts available through the cylindrical locks catalog at SecurityParts.com.

Cylindrical locks install through two bored holes in the door face and edge. They are faster to install than mortise locks and are the standard for interior commercial doors, office suites, classrooms, storage rooms, and any opening that does not require the full function range of a mortise lock.

A cylindrical lock consists of the exterior trim (cylinder and lever or knob), the interior trim (lever, knob, or thumb turn), the chassis (which contains the latch and function mechanism), and the strike plate. Each component is independently serviceable.

ANSI Functions for Cylindrical Locks

Cylindrical locks are available in standardized ANSI function codes that define how the lock behaves from each side of the door. Common commercial functions include:

Passage: Free passage from both sides. No locking function.
Privacy: Push-button lock from inside. No key override. Common on single-occupancy restrooms.
Storeroom: Always locked from outside, always free egress from inside. Key required for entry.
Classroom: Interior lever always free. Outside lever locked by key from outside, without entering the room. The standard for school classroom doors.
Entrance: Thumb turn on inside controls outside lever. Key can also lock or unlock from outside.

For cylindrical lock component identification and replacement parts, see the cylindrical lock parts guide.

Door Closers: Controlled Closing for Every Commercial Opening

LCN 4000 Series surface-mounted commercial door closers. One of the most widely installed commercial closer lines in North America. OEM replacement parts available at SecurityParts.com.

A door closer is a hydraulic device that controls the speed and force with which a door closes. On any fire-rated door, a closer is mandatory: the door must close and latch automatically after every use to maintain the fire rating. On non-fire-rated doors, closers prevent door slamming, reduce wear on the lock and frame, and are required on ADA-compliant openings where the closing force must not exceed a specified resistance.

Types of Commercial Door Closers

Surface-Mounted Closers

Mounted on the surface of the door or frame. Visible hardware. The most common type in commercial buildings because they are easy to install, adjust, and service without removing the door from its hinges. LCN's 1000 and 4000 series are industry standards.

Concealed Closers

Installed inside the door or frame, invisible from the outside. Used where aesthetics are a priority and exposed hardware would be undesirable. Require specialized door preparation.

Electromechanical Closers and Hold-Open Devices

Surface-mounted closers with an electromagnetic hold-open function. The door is held open by the magnet and closes automatically when the fire alarm triggers, releasing the magnetic hold. Required in fire-exit corridors where free passage is needed during normal operation but the door must close on alarm activation.

For door closer component identification and replacement parts, see the door closers parts guide and the LCN door closer parts guide.

Electric Strikes: Electrified Locking for Access Control

An electric strike replaces the standard mechanical strike plate in the door frame. The strike has a moving keeper that, when electrically released, allows the latch bolt to pass through even though the lock lever is in the locked position. This enables a door to be unlocked remotely via a card reader, keypad, or intercom without modifying the lockset itself.

Electric strikes are one of the most common methods of integrating existing mechanical hardware into an access control system because they work with most cylindrical locks, mortise locks, and exit devices without changing the door or lock preparation.

Fail-Safe vs Fail-Secure Electric Strikes

This is the most important specification decision when selecting or replacing an electric strike:

Fail-safe: The strike releases (unlocks) when power is lost. Used on egress doors where the door must be openable during a power outage or fire alarm, when the building's fire alarm system typically cuts power to all access-controlled doors.
Fail-secure: The strike remains locked when power is lost. Used on high-security openings where unauthorized access during a power event is the greater risk.

The fail-safe or fail-secure decision is a life-safety consideration and must align with the building's fire alarm integration and local code requirements. Never substitute one for the other without verifying code compliance.

For electric strike component identification and OEM replacement parts, see the electric strike parts guide.

Deadbolts: Secondary Locking for Commercial Openings

A deadbolt provides a secondary locking point that is independent of the primary latch. Unlike a spring latch, a deadbolt cannot be retracted without deliberate action: turning a key from outside or operating a thumb turn from inside. The bolt is solid steel and engages a reinforced strike plate in the door frame.

In commercial buildings, deadbolts are used on exterior office doors, storage rooms, server rooms, and any opening where the primary cylindrical lock function alone is not sufficient security. They are also used in classroom deadbolt configurations (such as the Schlage B663) where the outside lever is always locked and the deadbolt is operated from inside to secure the room during a lockdown.

For deadbolt component identification and replacement parts, see the deadbolt parts guide.

Panic Hardware and Exit Alarms: Controlled Egress Devices

Beyond standard exit devices, two specialized categories address situations where egress must be monitored or delayed:

Alarmed Exit Devices

Exit devices equipped with a local battery-powered alarm that sounds when the door is pushed open without being disarmed. Used on secondary exit doors in retail stores, warehouses, and educational buildings where the door should only be used in emergencies. The Detex alarm exit hardware line is the standard for this application in North American commercial buildings.

For Detex alarm hardware parts, see the exit alarms parts and diagrams guide. Browse Detex parts at SecurityParts.com.

Delayed Egress Devices (Chexit)

Delayed egress devices are exit devices with a timed delay that sounds a local alarm and holds the door for a set period (typically 15 seconds) before releasing. They are used in memory care facilities, psychiatric units, and retail locations where unauthorized egress is a safety or loss-prevention concern. NFPA 101 regulates where delayed egress is permitted.

Von Duprin's Chexit option is the standard delayed egress modification for the 98/99 series exit device. For Chexit parts, see the Von Duprin 98/99 series parts guide.

For a broader overview of panic hardware applications and code requirements, see the panic hardware for commercial doors guide.

Electrified Hardware: Integrating Mechanical Locks with Access Control

Electrified hardware refers to mechanical door hardware that has been modified or designed to operate under electrical control. It is the bridge between traditional locksets and modern access control systems. A door can be mechanically sound and electrically controllable at the same time.

Common Electrified Hardware Types

Electric Latch Retraction (EL)

Allows the latch bolt on an exit device or mortise lock to retract electrically, enabling the door to swing open without mechanical operation of the push bar. Used on high-traffic controlled entries where doors must release remotely on demand.

Electrified Trim

Outside lever assemblies on mortise locks that can be electrically locked or unlocked while maintaining free egress from the inside. The credential is presented outside, power is applied or cut to the trim, and the lever operates or remains locked accordingly.

Motorized Latch Retraction

A motor-driven mechanism that retracts the latch bolt via an electrical signal. Used on high-security or high-traffic applications where consistent, mechanical-free operation is required. Schlage's L9580 motorized latch retraction is an example of this configuration.

For guidance on integrating electrified hardware with access control systems, see the access control and commercial door hardware integration guide.

How Hardware Categories Work Together on a Single Opening

On most commercial exit doors, several hardware categories are installed on the same opening and interact with each other. Understanding these relationships prevents misdiagnosis when something fails.

A typical controlled exit opening in a commercial building has:

An exit device on the interior that provides panic egress
An electric strike in the frame that provides the electronic locking point from outside
A door closer at the top of the door that ensures the door closes and latches after every use
An outside trim lever connected to the exit device that allows keyed entry from outside
A credential reader that signals the electric strike to release on valid access

When a symptom appears, the question is always: which component in this chain has failed? A door that will not latch could be a misaligned strike (frame issue), a worn latch (exit device issue), or a closer that is not pulling the door all the way shut (closer issue). The hardware category determines which parts to inspect and which replacement parts to order.

For systematic troubleshooting across all hardware categories on a commercial opening, see the commercial door hardware troubleshooting guide.

New Installation vs Maintenance and Replacement

This distinction matters because it determines what you need to order and where to source it.

New Installation: Full Hardware Specification

Specifying hardware for a new commercial opening means selecting a complete hardware set: the lock function, the manufacturer, the finish, the handing, the grade, the closer type, and any electrification required. Every component is new and must be coordinated to work together. This is typically done by an architectural hardware consultant or a contractor working from a project hardware schedule.

Maintenance and Replacement: Component-Level OEM Parts

Maintaining existing installed hardware means identifying exactly which component has failed and ordering the correct OEM replacement part for the specific model installed. This is a different task from new specification. The lock case, the door preparation, and the surrounding hardware are already in place. Only the failed component is replaced.

This is SecurityParts.com's specialty. Whether the failed component is a dogging shaft on a Von Duprin exit device, a cylinder assembly on an LCN closer, a latch bolt on a Schlage mortise lock, or an electric box assembly on a Von Duprin electric strike, OEM parts are available by model and part number.

OEM parts are the correct choice for commercial hardware maintenance. Aftermarket substitutes may not meet the same tolerances, cycle ratings, or finish specifications as the original. For a detailed comparison, see the OEM vs aftermarket commercial door hardware parts guide.

How to Identify the Right OEM Replacement Part

Ordering the wrong part is the most common and most avoidable error in commercial hardware maintenance. The correct identification process follows the same three steps regardless of hardware category:

Identify the manufacturer and model. The manufacturer name and model number are stamped on the device body, the cylinder face, or the closer arm. Never order by description alone. A "Von Duprin rim exit device" includes dozens of models with different part numbers.
Identify the failed component by its function. Does the bolt not retract? That is a different component from a bolt that retracts but does not throw. Symptoms point to specific components. Comparing the symptom to the parts diagram for that model narrows the search.
Confirm the part number before ordering. Every model page on SecurityParts.com includes the part number, a description, and compatibility information. Confirm the part number matches the installed model before adding to cart. If unsure, call 845-935-0301.

For a detailed guide to part identification by hardware category, see the security door parts guide.

Hardware Finishes on Commercial Openings

Commercial security hardware is available in a range of ANSI standard finishes. The finish code matters for replacement orders because the new part must match the existing installation visually and in corrosion resistance. Common commercial finishes include US26D (satin chrome), US10B (dark bronze), US32D (satin stainless), and US28 (satin aluminum).

For a full finish code reference and matching guidance across all hardware types, see the commercial door hardware finish guide.

Maintenance Schedules for Commercial Security Hardware

Commercial security hardware is designed for thousands of daily cycles, but it requires periodic maintenance to reach its rated lifespan. Deferred maintenance on a single component accelerates wear across every other component on the same opening.

The key maintenance intervals for commercial hardware:

Every 6 months: Lubricate cylinder keyways with graphite or dry PTFE. Check door closer fluid. Verify latch engagement with the strike plate.
Annually: Tighten all mounting fasteners. Check closer spring tension and adjust sweep and latch speeds. Inspect exit device push bar for play. Verify electric strike keeper operation.
After any forced entry attempt: Inspect every component before returning the opening to service. Micro-fractures in bolts and frames are not always visible but will fail under subsequent loading.

For a complete, printable maintenance schedule organized by hardware category, see the commercial door hardware maintenance checklist.

OEM Replacement Parts for Commercial Security Hardware at SecurityParts.com

SecurityParts.com has supplied OEM commercial door hardware parts since 2001. The catalog covers Schlage, Von Duprin, LCN, Falcon, and Detex, organized by brand, model, and part number. Whether you need a replacement cylinder assembly for an LCN closer, a new push bar for a Von Duprin exit device, an electric box assembly for an electric strike, or trim components for a Schlage L-Series mortise lock, parts are available by the model-specific part number with same-day shipping on stocked components.

For pre-order part identification assistance and same-day shipping availability, call 845-935-0301 or visit the SecurityParts.com contact page.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Schlage, Von Duprin, LCN, Falcon, and Detex parts since 2001. All hardware specifications, ANSI grade descriptions, and product references are verified against live SecurityParts.com product pages and manufacturer documentation. For part identification and same-day shipping on stocked OEM components, call 845-935-0301 or visit the SecurityParts.com contact page.

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Commercial Door Hardware for Government Buildings: GSA Standards, Schlage Primus XP and High Security Cylinders Guide Wednesday, August 12, 2026

Government buildings are classified by the GSA Interagency Security Committee (ISC) Facility Security Level (FSL I through V) framework, which determines the required level of protection for door hardware and access control. FSL II buildings require key or PACS access at entrances and UL 437 high security cylinders on utility, mechanical, and electrical rooms. FSL III and above require progressive access control integration. The Schlage Primus XP is the standard high security cylinder for government applications: it adds a second independent sidebar and five finger pins to the standard pin tumbler, providing pick resistance, bump key resistance, and factory-controlled geographic exclusivity at five levels. PIV (Personal Identity Verification) credentials are required for PACS in federal buildings at FSL II and above. The ABA (Architectural Barriers Act) applies to federal buildings, not the ADA, though both have nearly identical hardware requirements.

Government buildings operate under layers of federal security standards that most commercial buildings never encounter. The GSA Interagency Security Committee framework, HSPD-12 PIV credential requirements, and the specific cylinder security requirements that flow from the FSL determination all point to hardware specifications that go significantly beyond standard commercial Grade 1 products. Understanding which standards apply and what hardware they require prevents the specification errors that delay government projects and create security compliance gaps.

Browse government-grade hardware parts at SecurityParts.com: Schlage ND Series cylindrical lock parts for government Primus XP applications, Schlage L Series mortise lock parts for government buildings, Schlage Primus XP and Everest 29 high security cylinder parts, Von Duprin exit device parts for government building egress, and the complete Allegion government hardware catalog.

April 19, 1995 Oklahoma City Murrah Federal Building bombing: the historical event that directly created the ISC federal facility security standard through Executive Order 12977

UL 437 High security cylinder listing required for utility, mechanical, and electrical rooms at GSA FSL II buildings and critical areas at higher FSL buildings

5 levels Schlage Primus XP geographic exclusivity levels from local stock (Level 1) to national exclusive (Level 5: no other US customer shares the same side bitting)

ABA, not ADA Federal buildings are governed by the Architectural Barriers Act (1968), enforced by the Access Board, not the ADA which applies to state, local, and commercial buildings

The Oklahoma City Bombing and the Creation of Federal Facility Security Standards

The April 19, 1995 bombing of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, killed 168 people and injured hundreds more. It was the deadliest domestic terrorist attack on a federal facility in US history at that time. A truck packed with explosives was detonated in the parking area adjacent to the building, and the resulting blast destroyed a significant portion of the structure.

In direct response, President Clinton signed Executive Order 12977 in October 1995, establishing the Interagency Security Committee (ISC). The ISC was charged with developing and implementing security standards, policies, and best practices for non-military federal facilities. The Oklahoma City bombing is explicitly referenced in the preamble of the ISC Risk Management Process as the foundational event for the current federal facility security framework. Every GSA building security requirement for door hardware, access control, PACS integration, and physical cylinder specifications flows from the regulatory structure that the Oklahoma City bombing created.

The GSA Facility Security Level Framework

The GSA Interagency Security Committee (ISC) classifies federal facilities from FSL I (lowest risk) through FSL V (highest risk). The FSL determination is based on five factors: mission criticality, symbolism (public perception and visibility of the agency), threat to tenants, population (number of employees and public), and size. The FSL then determines the required countermeasures for the facility, including door hardware and access control specifications.

ILowest

Small offices, low public access, non-critical missions. Basic mechanical locks. Conventional keyway cylinders acceptable.

IILow

Medium offices, some public access. Key or PACS for entrances. UL 437 cylinders required for utility, mechanical, and electrical rooms.

IIIMedium

Larger facilities, significant public access or mission sensitivity. PACS with card access. High security cylinders for non-public areas. PIV-compliant readers at entrances.

IVHigh

High mission criticality, law enforcement or judicial functions, or significant symbolic value. Enhanced PACS, multi-factor authentication, reinforced hardware. Primus XP high security cylinders standard throughout.

VHighest

Critical missions requiring maximum protection. Highest-grade hardware, national-exclusivity key systems, biometric and PIV multi-factor PACS. Restricted access throughout entire facility perimeter.

The FSL determination error that produces non-compliant government project specifications: The FSL for a federal facility is not determined by the specifier or the contractor: it is determined by the occupant agency and the Facility Security Committee (FSC) for multi-tenant buildings, following the ISC Risk Management Process. Hardware specifications must be based on the FSL determination produced by this process, not on the specifier's assessment of the building type or the contractor's assumption about what government buildings require. Specifying FSL II-level hardware in a building that the FSC has determined is FSL IV creates a compliance gap that becomes visible during GSA security audits.

UL 437 High Security Cylinder: What the Listing Actually Certifies

UL 437 is the Underwriters Laboratories Standard for Safety for Burglary Resistant Locks. A UL 437 listing certifies that the cylinder has been independently tested and confirmed to resist specific physical attack methods, including picking, drilling, sawing, pulling, wrenching, and extreme key manipulation. The certification is not a manufacturer's claim: it is a documented test result from an independent laboratory.

The GSA FSL II security requirements document specifies: "Utility, mechanical, electrical, and telecom rooms shall be secured with high-security (UL 437) locks." This requirement flows directly from the risk that these rooms represent: a compromised mechanical room allows an adversary to disable building systems, and a compromised electrical room can be used to stage attacks on the facility's power and security infrastructure. High security cylinders on these rooms are the minimum standard for FSL II and represent the baseline across all higher FSL levels.

UL 437 vs Standard Grade 1: The Specific Test Differences

ANSI/BHMA A156.5 Grade 1 is the commercial standard for quality and durability in mechanical cylinders. UL 437 is a separate standard specifically for security against physical attack. A cylinder can be ANSI/BHMA Grade 1 (durable and functional for commercial use) without being UL 437 listed (tested for attack resistance). For government buildings at FSL II and above, Grade 1 alone is not sufficient for critical area cylinders. The hardware must specifically carry the UL 437 listing. Browse Schlage Primus XP UL 437 listed cylinder parts at Security Parts.

Schlage Primus XP: The High Security Cylinder Standard for Government Buildings

The Schlage Primus XP is the government-grade upgrade that adds a second, independent locking mechanism to any Schlage cylinder format, providing security properties that standard pin tumbler cylinders cannot offer regardless of their ANSI grade.

Standard Schlage Cylinder

Single pin tumbler mechanism only

Mechanism: Six pin tumbler pairs. The correct key lifts each pin pair to the shear line, allowing the plug to rotate.

Pick vulnerability: A skilled picker can manipulate the pin pairs one at a time to the shear line without a key. Single tension wrench and pick tool.

Bump key vulnerability: An impact key struck sharply causes pins to momentarily jump, crossing the shear line. Bump keys can open standard cylinders with minimal skill.

Duplication control: Standard keyway blanks available commercially. Keys can be cut by any locksmith with the correct blank.

Schlage Primus XP Cylinder

Dual mechanism: pin tumbler + independent sidebar

Mechanism: Standard six pin tumbler plus a second independent sidebar with five finger pins. The Primus XP key has both standard top cuts and factory-milled side bitting. Both mechanisms must be simultaneously satisfied for the plug to rotate.

Pick resistance: Picking the pin tumbler to the shear line does not release the sidebar finger pins. The sidebar mechanism remains locked even when pin tumbler picking is successful, preventing plug rotation.

Bump key resistance: Impact force does not affect the sidebar finger pins, which require precise depth engagement from the factory side bitting, not impact force. Bump keys are ineffective against the Primus XP sidebar.

Duplication control: The side bitting is factory-milled only, using tooling controlled by Allegion. Key blanks are not available through commercial distribution. Geographic exclusivity at five levels prevents key sharing across the customer base.

Primus XP Backward Compatibility: The Transition Advantage

A critical operational advantage of the Primus XP system is backward compatibility: Primus XP keys operate both Primus XP high security cylinders and standard (non-Primus) Schlage cylinders on the same keyway family. This means a government facility transitioning from standard Schlage cylinders to Primus XP can replace cylinders progressively, starting with the highest-security areas, while issuing Primus XP keys that continue to operate the remaining standard cylinders already installed. No lock-out event occurs during transition, and the complete key system does not need to be replaced simultaneously.

Browse Schlage Primus XP cylinder and high security key system parts at Security Parts.

The Five Schlage Primus Geographic Exclusivity Levels

Level 1
Side bitting available from local stock. Multiple customers in the same area may share the combination. Not recommended for government applications where key uniqueness is a security requirement. Standard Primus, not Primus XP exclusivity.
Level 2
Side bitting restricted to customers within a designated metro area or region. Some sharing of combinations within the region is possible. Acceptable for low-risk government facilities where the main benefit is pick and bump resistance, not combination exclusivity.
Level 3
Side bitting restricted to customers within a defined geographic territory. Fewer shared combinations. The combination is allocated to a smaller customer pool, reducing the probability that another organization's key could incidentally operate the cylinder.
Level 4
Side bitting allocated to a single customer region with strict ordering controls. Significantly reduced sharing. Appropriate for medium-high security government applications where geographic key exclusivity is part of the security specification.
Level 5 (National)
The side bitting combination is exclusive to a single end user at the national level. No other Allegion customer anywhere in the United States uses the same side bitting combination. The physical Primus XP key is unique to that agency or facility. This is the correct specification for FSL IV and V federal facilities where key system uniqueness is part of the threat countermeasure design.

The Primus XP side bitting factory control mechanism that makes unauthorized duplication a federal crime: Primus XP side bitting is milled exclusively at the Schlage factory using proprietary tooling. Key blanks with pre-milled Primus side bitting are not available through commercial distribution. Any attempt to duplicate a Primus XP key through reverse engineering or tooling modification produces a key that does not correctly engage the five sidebar finger pins, because the side bit depths require factory precision not achievable with field equipment. Beyond the mechanical barrier, Primus XP keys are covered by patents that make unauthorized duplication a patent infringement violation enforceable under federal law. The combination of physical impossibility with standard tools and federal patent protection creates two independent barriers against key duplication.

PIV Credentials and PACS in Federal Buildings

Homeland Security Presidential Directive 12 (HSPD-12), signed in August 2004, mandated a common identification standard for all federal employees and contractors accessing federal facilities. FIPS 201 (Federal Information Processing Standard Publication 201) defines the Personal Identity Verification (PIV) credential: a smart card carrying a digital photograph, biographic data, fingerprint biometrics, and cryptographic keys on an embedded chip.

For physical access control, PACS at FSL II and above must accept PIV credential authentication. This means the card reader at the door must read the PIV chip's cryptographic credentials and validate them electronically, not just read a card number from a magnetic stripe or proximity antenna. GSA maintains an Approved Products List (APL) for PACS components including card readers, control panels, and credential management systems. Only APL-listed products may be installed in GSA-controlled PACS systems.

PIV vs Standard Proximity Card: The Authentication Difference

A standard HID 125 kHz proximity card reader reads a facility code and card number from the card's antenna. The card contains no cryptographic content and cannot verify that the card presented is the genuine card assigned to that employee. A card can be cloned by reading its broadcast data with a covert reader. A PIV card reader reads the chip's cryptographic certificate and validates the digital signature against a trusted root. The card cannot be cloned because the private cryptographic key is stored on the chip and never leaves it. For government facilities where credential cloning is a threat, standard proximity cards do not satisfy the HSPD-12 PIV requirement regardless of the PACS platform in use.

Hardware Requirements by Government Building Zone

Area / Zone	Minimum Cylinder	Access Control	Exit Hardware	Key Products
Public building entry (FSL II-III)	Conventional restricted keyway (Everest 29 R)	PACS with card access; PIV-compliant reader at FSL II+	Von Duprin exit device with QEL for access control integration	Von Duprin exit device parts
Utility, mechanical, electrical rooms (FSL II+)	UL 437 high security (Primus XP)	Keyed access with UL 437 cylinder; no public access	Standard self-closing with positive latch; fire-rated per wall rating	Schlage Primus XP cylinder parts
Secure/sensitive offices (FSL III-IV)	Primus XP Level 4-5 geographic exclusivity	PACS with PIV multi-factor; audit trail required	Von Duprin with cylindrical trim; no dogging on exterior exits	Schlage ND Series cylindrical lock parts
General office (FSL II-III)	Everest 29 R restricted keyway; Primus XP optional	Mechanical key or PACS depending on FSL and occupancy	Standard cylindrical or mortise office function	Schlage L Series mortise lock parts
Emergency exit (all FSL levels)	Exit device cylinder in restricted keyway	Exit alarm or monitored exit device; dogging key control	Von Duprin 98/99 Series fire exit hardware on fire-rated doors	Von Duprin 98/99 exit device parts

ABA vs ADA: Which Accessibility Law Applies to Federal Buildings

The ADA (Americans with Disabilities Act) applies to state and local government facilities, commercial establishments, and public accommodations. Federal government buildings are governed by the ABA (Architectural Barriers Act of 1968), which predates the ADA by 22 years. The ABA is enforced by the United States Access Board, which publishes the ABA Accessibility Standards.

The practical hardware specification difference is almost nil: the ADA Accessibility Standards and the ABA Accessibility Standards contain nearly identical technical requirements for door hardware. Lever handles operable with one hand, maximum 5 pounds opening force on interior doors, hardware mounted between 34 and 48 inches above the finished floor. The distinction matters in two contexts: compliance documentation (federal building projects must cite ABA compliance, not ADA compliance, in their project documentation) and enforcement (ABA violations are filed with the Access Board, not through the ADA enforcement mechanism). A federal contractor or facilities manager who documents door hardware compliance by reference to ADA rather than ABA is citing the wrong legal authority, even though the technical requirements produce the same specification result.

For parts support and specification assistance for government hardware projects, contact SecurityParts.com at 845-935-0301 or the contact page.

Why Choose Security Parts for Government Building Hardware Parts

Oklahoma City ISC origin documented, FSL II UL 437 utility room requirement specified, Primus XP dual mechanism explained, Level 5 national exclusivity, ABA vs ADA distinction, and same-day OEM shipping.

Oklahoma City ISC Origin

We document the Oklahoma City bombing as the historical event that directly created the ISC security framework through Executive Order 12977. Understanding why the standard exists explains the urgency behind FSL compliance documentation requirements.

Primus XP Dual Mechanism

We explain specifically why Primus XP picks and bump keys fail: picking the pin tumbler does not engage the sidebar, and bump key impact does not affect sidebar finger pins. This mechanism explanation is not documented at the parts level by any competitor.

ABA vs ADA Distinction

We document that federal buildings are governed by the ABA, not the ADA, and that citing ADA compliance in federal project documentation references the wrong legal authority even though the technical hardware requirements are nearly identical.

Same-Day OEM Shipping

Schlage Primus XP, Von Duprin exit device, and government hardware parts ship same day from US warehouses. Call 845-935-0301 or the contact page for government specification support.

What Makes Security Parts Different for Government Hardware Parts

We document the Oklahoma City Murrah Federal Building bombing as the specific historical event that directly created the ISC security standard through Executive Order 12977, signed by President Clinton in October 1995. This history is the foundation of every federal facility security hardware requirement and is not documented at the parts level by any competitor.
We document the specific reason Primus XP cylinders resist picking: picking the pin tumbler mechanism does not engage the independent sidebar, so even a fully picked pin stack does not allow plug rotation. And bump keys are ineffective because sidebar finger pins require precise depth engagement from factory side bitting, not the impact force that bump keys rely on.
We document the five geographic exclusivity levels with the Level 5 national exclusivity definition: no other Allegion customer anywhere in the United States uses the same side bitting combination. This is the correct specification for FSL IV and V federal facilities and is not explained at the specification or parts level by any competitor.
We document the ABA vs ADA distinction for federal building accessibility documentation: federal buildings are governed by the Architectural Barriers Act (1968), enforced by the Access Board, not by the ADA. Citing ADA compliance in federal project documentation is citing the wrong legal authority.
We carry Schlage Primus XP high security cylinder parts, Schlage ND Series cylindrical lock parts, Von Duprin exit device parts, and Schlage L Series mortise lock parts for all government hardware categories.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Government Building Door Hardware

What are the GSA Facility Security Levels and how do they determine door hardware requirements?

The ISC Facility Security Level framework (FSL I through V) classifies federal facilities by risk based on mission criticality, public access, symbolism, population, and size. FSL I (lowest) requires basic mechanical locks. FSL II requires key or PACS at entrances and UL 437 high security cylinders for utility and mechanical rooms. FSL III and IV require progressive PACS integration with PIV-compliant readers. FSL V requires the most stringent access control throughout. The FSL is determined by the agency and Facility Security Committee following the ISC Risk Management Process, not by the specifier. All hardware specifications must reference the documented FSL determination.

What is the Schlage Primus XP and how does it differ from a standard Schlage cylinder?

The Primus XP adds a second independent sidebar mechanism with five finger pins to the standard six-pin tumbler. The Primus XP key has both standard top cuts and factory-milled side bitting. Both mechanisms must be satisfied simultaneously for the plug to rotate. Picking the pin tumbler does not engage the sidebar. Bump keys are ineffective against the sidebar finger pins. The side bitting is factory-controlled only, making unauthorized duplication both mechanically impractical and a federal patent infringement. Optional UL 437 listing adds hardened steel anti-drill pins, certifying resistance to picking, drilling, and extreme physical attacks.

What are the five Schlage Primus geographic exclusivity levels?

Level 1: local stock availability, multiple customers may share the combination. Levels 2-4: progressively restricted geographic sharing within metro areas, regions, and territories. Level 5 (national exclusive): the side bitting combination is exclusive to a single end user at the national level. No other Allegion customer in the United States uses the same combination. Level 5 is the correct specification for FSL IV and V federal facilities where key system uniqueness is a security countermeasure.

What is the Oklahoma City connection to federal building security standards?

The April 19, 1995 bombing of the Alfred P. Murrah Federal Building killed 168 people. President Clinton responded by signing Executive Order 12977 in October 1995, creating the Interagency Security Committee tasked with developing security standards for non-military federal facilities. The ISC Risk Management Process, first published in 2001 and updated through the 2024 Edition, is the framework that today requires UL 437 cylinders, PACS integration, and Primus XP specifications in federal buildings. Every hardware standard for government buildings traces back to this historical event.

What is the PIV credential requirement for federal building access control?

HSPD-12 (2004) and FIPS 201 mandate PIV smart card credentials for federal employees and contractors. Federal PACS at FSL II and above must read and validate PIV chip cryptographic credentials, not just card numbers. Standard proximity card readers are not PIV-compliant. GSA maintains an Approved Products List (APL) for PIV-compliant PACS hardware. PIV cards cannot be cloned because the private cryptographic key is stored on the chip and never transmitted. Only APL-listed PACS components may be installed in GSA-controlled access control systems.

Does the ADA or the ABA apply to door hardware in federal buildings?

The ABA (Architectural Barriers Act of 1968) applies to federal buildings, enforced by the US Access Board. The ADA applies to state and local government facilities and commercial buildings. Both have nearly identical technical door hardware requirements (lever handles, 5-pound opening force limit, 34 to 48 inches mounting height). The practical specification result is the same hardware, but federal project documentation must cite ABA compliance and the ABA Accessibility Standards, not ADA compliance. Citing ADA in federal project documents references the wrong legal authority even though the technical requirements are functionally identical.

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Schlage 09-506 M63 Outside Lever: L-Series Trim Guide, Handing, Rose Selection, and M63 vs M62 Comparison Wednesday, August 12, 2026

The Schlage 09-506 M63 outside lever is the OEM replacement outside lever assembly for Schlage L-Series mortise locks equipped with the M63 lever design. If you are replacing worn trim on an existing L-Series lock, sourcing parts for a maintenance program, or configuring a new installation, this guide covers everything you need to order correctly the first time.

Browse and order the Schlage 09-506 M63 Outside Lever Assembly at SecurityParts.com.

Quick Answer

The 09-506 is Schlage's base part number for L-Series outside lever assemblies. The lever style suffix (M63, M62, M57, etc.) identifies the specific decorative design.
The M63 is a specific Schlage lever design. Both Schlage (09-506 M63 for L-Series) and Von Duprin (114xxx M63 lever kits) use the M63 designation but they are different products for different hardware systems.
You must specify finish, rose style, and handing when ordering the 09-506 M63.
The 09-506 M63 does not include the mortise lock case, cylinder, or inside lever. Order those separately if needed.
The companion inside lever is the Schlage 09-402 M63.
All L-Series parts are available at SecurityParts.com through the Schlage L-Series parts catalog.

What Is the Schlage 09-506 M63 Outside Lever Assembly

The Schlage 09-506 is the part number for the outside lever and rose assembly on Schlage L-Series and LE-Series Grade 1 mortise locks. The lever style suffix tells you which decorative lever design is included. In this case, M63 refers to a specific Schlage lever pattern used on commercial installations throughout North America.

The 09-506 M63 is an OEM part, meaning it is manufactured to the exact specifications of the original hardware. It is not an aftermarket substitute. For guidance on why this matters in commercial applications, see the OEM vs aftermarket commercial door hardware guide.

What the 09-506 M63 Includes

The outside lever assembly includes the exterior lever and the rose plate. It does not include:

The mortise lock case or chassis
The lock cylinder
The inside lever or inside trim
Strikes or deadbolts

If you need the matching inside lever, that is a separate part. See the Schlage 09-402 M63 inside lever, available separately at SecurityParts.com.

Which Locks Use the 09-506 M63

The 09-506 M63 is designed for Schlage L-Series and LE-Series Grade 1 mortise locks. The L-Series is Schlage's heavy-duty commercial mortise lock platform and one of the most widely installed commercial lock systems in North American institutional, healthcare, government, and educational buildings.

L-Series mortise locks cover a broad range of ANSI functions. The outside lever assembly is the exterior trim component and is compatible across the L-Series function range. For a detailed breakdown of L-Series parts by function, see the Schlage L-Series parts and diagrams guide.

Schlage commercial door hardware at SecurityParts.com. OEM L-Series replacement parts including outside lever assemblies, inside levers, cylinders, and case components.

The Three Variables to Specify When Ordering the 09-506 M63

Every 09-506 M63 order requires three specifications. Getting any one of them wrong means the part either will not fit or will not match the existing installation.

1. Finish

The finish code matches the lever to the installed hardware and the door specification. The 09-506 M63 is available in a range of ANSI standard finishes. Common finishes include US26D (satin chrome), US32D (satin stainless), US10B (dark oxidized bronze), and others.

If you are replacing a lever on an existing installation, the finish code is stamped on the hardware or listed on the original lock specification sheet. Ordering a mismatched finish creates a visible discrepancy that is difficult to correct without replacing additional components. For a full finish code reference and matching guidance, see the commercial door hardware finish guide.

2. Rose Style

The rose is the plate that surrounds the lever on the door face. Different rose styles match different door preparations and architectural requirements. The rose selection is a required field when ordering the 09-506 M63 through SecurityParts.com.

If you are unsure which rose style is currently installed, the easiest identification method is looking at the shape and size of the existing rose plate on the outside of the door. Confirm the rose style before ordering to avoid a return.

Rose trim vs escutcheon trim: The Schlage 09-506 M63 is a rose trim assembly. L-Series outside lever trim is available in two formats: rose trim (a round or rectangular plate behind the lever) and escutcheon trim (a larger, full-cover plate). If your installation uses escutcheon trim, the part number is different from the 09-506 M63. Confirm which trim format is installed before ordering. If unsure, call 845-935-0301 for identification assistance.

3. Handing

Lever trim is handed, meaning the lever is designed for either a right-hand or left-hand door. Handing is not optional and cannot be adjusted in the field. Ordering the wrong handing results in a lever that mounts incorrectly relative to the door swing.

How to determine handing for the 09-506 M63:

Stand on the outside of the door (the side that has the keyed cylinder). If the hinges are on your left, the door is right-hand (RHR). If the hinges are on your right, the door is left-hand (LHR). For reverse-bevel doors, reverse this determination.

Confirm handing before placing the order. The 09-506 M63 is available in both right-hand and left-hand configurations at SecurityParts.com.

M63 vs M62: Understanding the Lever Style Difference

M63 and M62 are two distinct Schlage lever designs used on the L-Series platform. They are the most frequently confused lever styles when ordering replacement outside trim, because both are common on existing commercial installations and the names are similar.

The M63 and M62 are different in their physical shape and profile. They are not interchangeable. The 09-506 M62 and the 09-506 M63 both use the same base part number (09-506) but are different assemblies that cannot be swapped on an existing installation without also replacing the rose and potentially other trim components.

How to Identify Whether Your Lock Has M63 or M62 Trim

The lever style is typically marked on the original specification sheet provided when the lock was ordered. On installed locks, the most reliable identification method is comparing the physical profile of the existing lever to Schlage's lever style reference materials.

If you cannot determine the lever style from visual inspection alone, the full part number (including the lever style suffix) is typically stamped inside the lock case when the case cover is removed, or is available from the original installation documentation. If none of this is available, SecurityParts.com pre-order support can help confirm the correct lever style. Call 845-935-0301.

Other 09-506 Lever Styles Available at SecurityParts.com

The 09-506 base number covers multiple lever styles for the L-Series. Beyond the M63, the following outside lever assemblies with the 09-506 base number are available at SecurityParts.com:

09-506 ME1, ME1 lever style for L-Series
09-506 M62, M62 lever style (confirm availability with SecurityParts.com)
09-506 M57, M57 lever style (confirm availability with SecurityParts.com)
09-506 M82, M83, M84, M85, M8x lever styles (confirm availability with SecurityParts.com)
09-506 ME2, ME3, ME series lever styles (confirm availability with SecurityParts.com)

Browse the complete outside lever assembly selection through the Schlage L-Series parts catalog at SecurityParts.com.

Schlage M63 vs Von Duprin M63: Two Different Products

This is the most important distinction on this page. The M63 lever design designation is used on both Schlage hardware and Von Duprin hardware, but the two are completely different products for different hardware platforms. They are not interchangeable.

Schlage 09-506 M63: L-Series Outside Lever Assembly

The Schlage 09-506 M63 is the outside trim assembly for Schlage L-Series and LE-Series Grade 1 mortise locks. It installs on the exterior face of the door as the keyed entry side of the L-Series mortise lock. It includes the lever and rose. It does not include the lock case, cylinder, or inside trim.

Von Duprin M63 Lever Kits: Exit Device Trim

The Von Duprin M63 lever kits (part numbers 114842 through 114849) are trim components for Von Duprin exit devices, not for Schlage L-Series mortise locks. These kits include right-hand (RH) and left-hand (LH) configurations for specific Von Duprin models.

Available Von Duprin M63 lever kits at SecurityParts.com:

Von Duprin 114846, M63RH Lever Kit, Model 360
Von Duprin 114842, M63LH Lever Kit, Model 360
Von Duprin 114848, M63RH Lever Kit, Model 360
Von Duprin 114844, M63LH Lever Kit, Model 360
Von Duprin 114849, M63RH Lever Kit, 996 Series
Von Duprin 114847, M63RH Lever Kit, 996 Series
Von Duprin 114845, M63LH Lever Kit, 996 Series
Von Duprin 114843, M63LH Lever Kit, 996 Series

If you are looking at a door with a Von Duprin exit device on the interior and an outside trim lever, the correct M63 part is from the Von Duprin 114xxx series, not the Schlage 09-506 series. If you are unsure which hardware system is installed, call 845-935-0301 for pre-order identification support.

The Schlage L-Series: Why the Outside Lever Matters

The outside lever on an L-Series mortise lock is the first component to show wear in normal operation, because it takes every entry contact on the exterior side of the door. On high-traffic commercial openings, this can mean hundreds of operations per day. The outside lever assembly is also the component most often damaged by forced entry attempts, environmental exposure on exterior doors, and general use over time.

Replacing just the outside lever assembly, rather than the entire mortise lock chassis, is the standard maintenance approach for worn exterior trim on a functional L-Series lock. The lock case, cylinder, and function hardware are unaffected by an outside lever replacement if the underlying mechanism is still operating correctly.

For a comprehensive breakdown of all L-Series mortise lock parts and their service sequences, see the mortise lock parts guide and the Schlage L-Series parts diagrams guide. For guidance on the L-Series in the context of commercial mortise lock specification and application, see the commercial mortise locks guide.

Ordering the Schlage 09-506 M63 at SecurityParts.com

SecurityParts.com has supplied OEM Schlage commercial hardware parts since 2001. The 09-506 M63 outside lever assembly is stocked with same-day shipping on available configurations.

To order correctly:

Confirm the lever design is M63 (not M62, M57, or another style)
Determine handing (right-hand or left-hand)
Identify the correct finish code for the installation
Select the correct rose style
Decide whether you also need the 09-402 M63 inside lever

Browse the Schlage 09-506 M63 Outside Lever Assembly at SecurityParts.com. For the full L-Series parts range, see the Schlage L-Series parts catalog. For Schlage key system and cylinder guidance relevant to L-Series installations, see the Schlage key systems guide.

For pre-order configuration assistance, call 845-935-0301 or visit the SecurityParts.com contact page.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Schlage, Von Duprin, LCN, Falcon, and Detex parts since 2001. Technical specifications and product availability are verified against live SecurityParts.com product pages and official Schlage L-Series documentation. For 09-506 M63 configuration support and same-day shipping, call 845-935-0301 or visit SecurityParts.com.

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Commercial Door Hardware for Retail Stores: Storefront Glass Doors, Panic Hardware and After-Hours Security Guide Tuesday, August 11, 2026

Retail stores have two distinct hardware environments: the glass storefront entry (aluminum narrow stile frames requiring Adams Rite deadlatches and deadlocks, floor concealed closers, and electric strikes) and the back of house (hollow metal frames accepting standard cylindrical and mortise locks, Von Duprin exit devices, and surface-mounted closers). Standard cylindrical locks physically cannot be installed in narrow stile aluminum frames: the 2-1/8 inch bore hole requirement exceeds the 2-inch stile width. Adams Rite deadlatches serve daytime operations; hook bolt deadlocks add after-hours security by interlocking with the strike to resist frame-spreading attacks. Fail-safe electric strikes are required on egress doors. The Von Duprin Guard-X exit alarm is specified on retail secondary exits to deter employee theft and unauthorized exit use with a non-relatch alarm that sounds until staff responds.

Retail door hardware specification covers two completely different hardware systems in the same building. The glass storefront requires specialized narrow stile products that have almost no overlap with standard commercial hardware. The back of house uses the same cylindrical locks, mortise hardware, and exit devices found in any commercial building. Specifying standard commercial hardware on an aluminum storefront door is not just a product mismatch: it is a physical incompatibility that requires complete hardware replacement in the field.

Browse retail hardware parts at SecurityParts.com: Schlage ND Series cylindrical lock parts for retail back-of-house doors, Schlage L Series mortise lock parts for medium stile storefront doors, Von Duprin exit device parts for retail egress doors, Von Duprin Guard-X exit alarm parts for retail theft deterrence, LCN door closer parts for retail back-of-house doors, and the complete Allegion retail hardware catalog.

2-1/8 in Standard cylindrical lock bore hole requirement vs approximately 2-inch aluminum narrow stile width: physically incompatible, cannot be installed

31/32 in Adams Rite deadlatch standard backset for narrow stile aluminum storefront doors (vs 2-3/4 inch standard backset for hollow metal doors)

Hook bolt Adams Rite deadlock hook bolt interlocks with strike, resisting frame-spreading pry attacks on aluminum storefront construction

Non-relatch Von Duprin Guard-X alarm stays active until staff uses a key to reset it, unlike standard exit alarms that reset when the door closes

Why Standard Commercial Locks Cannot Be Used on Aluminum Storefront Glass Doors

The dimensional incompatibility between standard cylindrical locks and aluminum narrow stile storefront frames is not a matter of preference or specification quality: it is a physical impossibility. A standard cylindrical lever lock requires a 2-1/8 inch bore hole through the door face to accommodate the lock body. A narrow stile aluminum storefront door has a stile width of approximately 2 inches. A 2-1/8 inch bore hole in a 2-inch stile leaves less than 1/16 inch of aluminum on each side of the bore, which provides essentially no structural integrity. The result is either a hole that cannot be fully cut without removing the entire stile web, or a structurally compromised door that fails under normal operating loads.

This dimensional fact is why the Adams Rite product line exists: the entire Adams Rite deadlatch and deadlock range is engineered to mount with a mortise pocket preparation rather than a through-bore, fitting within the narrow stile profile of aluminum storefront construction. The Adams Rite lock body mounts inside the stile edge, not through a bore hole in the face. This is an entirely different mounting approach from cylindrical or mortise locks designed for hollow metal or wood doors.

The storefront hardware specification error that generates the most field replacement calls: A contractor or property manager orders standard cylindrical lever locks for an aluminum storefront door replacement project, discovers on-site that the locks physically cannot be installed, and has to source Adams Rite hardware as an emergency replacement. This error is completely avoidable with one question before ordering: is the door an aluminum narrow stile storefront? If yes, Adams Rite (or equivalent narrow stile product). If no, standard cylindrical or mortise hardware. The two product categories are not interchangeable and share no installation dimensions in common.

The Two Core Adams Rite Products: Deadlatch vs Deadlock

Adams Rite Deadlatch

Daytime operation standard; self-latching on door closure

How it works: A spring-loaded latchbolt extends automatically when the door closes, engaging the strike without any manual key or lever operation. An anti-shim deadlocking plunger prevents the latch from being retracted by inserting a card, ruler, or thin tool between the door and frame.

Standard backset: 31/32 inch for narrow stile aluminum doors. Extended backsets available for wider stile profiles.

Inside operation: Paddle or thumb turn retracts the latch for egress.

Outside operation: Key retracts the latch for entry (store door function) or key locks/unlocks the paddle (classroom function).

Best for: Main retail entry doors; daytime-only security. Does not provide overnight protection without a supplemental deadlock.

Daytime Operation Standard

Adams Rite Deadlock

After-hours security; hook bolt resists frame-spreading attacks

How it works: A full deadbolt (hook bolt or straight bolt) that must be manually locked and unlocked with a key or thumb turn. Does not self-latch on door closure: the deadlock is an intentional after-hours action, not an automatic closure function.

Hook bolt advantage: The hook bolt interlocks with the strike keeper by curling around it, rather than simply projecting into a pocket. This interlocking prevents the door from being opened by spreading the aluminum frame away from the bolt, which is a common forced-entry technique against aluminum storefront frames where the frame members are relatively lightweight.

Multipoint versions: Add top and bottom rods for three-point engagement, providing maximum forced-entry resistance for high-value retail, cannabis dispensaries, jewelry stores, and pharmaceutical dispensaries.

Best for: After-hours overnight security supplementing the daytime deadlatch. Always paired with a deadlatch, not used alone.

After-Hours Supplement

The hook bolt pry attack resistance that straight bolt deadlocks lack: Standard straight bolt deadlocks project a rectangular bolt into a strike pocket. Against an aluminum storefront frame under a pry attack, an attacker can sometimes spread the frame enough to clear the bolt from the pocket and pull the door open. The Adams Rite hook bolt deadlock prevents this by curling the bolt around the strike keeper: spreading the frame does not disengage the hook because the hook physically wraps around the keeper. For retail environments where forced-entry resistance overnight is the priority (jewelry stores, dispensaries, electronics retailers), the hook bolt deadlock specification is the correct hardware choice, not the straight bolt version.

The Retail Hardware Schedule: Both Environments in One Reference

Set	Door Type	Lock	Closer	Additional
S-1	Glass storefront entry (single leaf)	Adams Rite deadlatch (store door function) + deadlock (after-hours)	Floor concealed closer (OHCC)	Electric strike (fail-safe) for access control; restricted cylinder
S-2	Glass storefront entry (double leaf)	Active leaf: Adams Rite deadlatch + deadlock. Inactive leaf: Adams Rite flushlock top and bottom	Floor concealed closers both leaves	Coordinator not typically needed on aluminum storefront pairs; verify with frame manufacturer
S-3	Stockroom / receiving (hollow metal)	Schlage ND Series storeroom function (always locked from stockroom side; key from both sides)	Surface closer if self-closing required	Security hinges NRP on outswing doors
S-4	Cash room / manager office	Cylindrical or mortise lock in office function; electronic keypad preferred for audit trail	Surface closer	Deadbolt supplement for after-hours; door alarm on electronic access event log
S-5	Fitting rooms	Schlage ND Series privacy function; lever both sides; inside button locks outside lever	None required	Occupancy indicator optional; no deadbolt (must allow emergency entry)
S-6	Rear exit / secondary exit (hollow metal)	Von Duprin exit device (panic hardware if occupant load 50+ under NFPA 101)	Surface closer	Von Duprin Guard-X exit alarm; security hinges NRP; cylinder for relock from outside

Floor Concealed Closers: The Standard for Glass Storefront Entries

A surface-mounted door closer attached to the top of a glass storefront entry door creates visual clutter on a glass door where the hardware profile is meant to be minimal. Retail architects and designers specify floor concealed closers (overhead concealed closers, OHCC) for glass storefront entries because the closer body is entirely recessed into the floor and the door bottom rail, with only the spindle visible at the door pivot point.

The glass storefront entry appears to have no visible closing mechanism at all, which is the aesthetic goal for high-end retail entries and retail environments where store merchandise and branding are the visual focus rather than the hardware. The floor concealed closer provides the same ADA-compliant opening force limits and closing speed control as a surface-mounted closer, with full compliance with self-closing requirements on rated doors, but entirely hidden from view.

Floor Concealed Closer Maintenance Consideration

Floor concealed closers require access to the floor pocket for maintenance and adjustment, which is more involved than adjusting valve screws on a surface-mounted LCN 4040XP. Pivot-style installation also means that the closer arm spindle is the wear point; spindle wear produces drooping or misaligned doors over time in high-cycle retail entries. Browse LCN door closer parts for retail application at SecurityParts.com for surface-mounted applications on back-of-house doors.

Electric Strike Selection for Retail Storefront Access Control

Fail-Safe Electric Strike

Unlocks on power loss; required on egress doors

Function: Strike keeper pivots open when power is removed (power loss or unlock signal). Door opens freely from inside without any hardware operation.

Required when: The door is on a required means of egress. IBC and NFPA 101 require that egress doors always be operable without a key, even during power failure.

Retail applications: Main storefront entry doors used by customers for both entry and egress. Any door where an occupant could be trapped inside if power fails and the door is locked.

Trade-off: Security is lost on power failure. A retail store with a fail-safe electric strike on the main entry has an unlocked entry during any power outage, requiring staff to secure the door manually or monitor it during the outage.

Fail-Secure Electric Strike

Remains locked on power loss; not for required egress

Function: Strike keeper remains in the locked position when power is removed. A mechanical key is required for egress when power fails.

Permitted when: The door is not on a required means of egress, or the occupancy and code permit controlled egress with mechanical key override as an acceptable alternative.

Retail applications: Secondary entry doors not used for egress. Storage room entry from a public corridor (not a means of egress door). Loading dock office entry doors where egress is available through adjacent routes.

Trade-off: On a door that is required egress, fail-secure is a code violation that creates a life safety hazard during power failure. Never use fail-secure on a door that could trap occupants if the power fails and the key is not available.

The fail-secure specification mistake on retail egress doors: Property managers and contractors sometimes specify fail-secure electric strikes on retail main entry doors because they want the door to remain locked if power fails (for after-hours security). This creates a code violation on a required egress door and a life safety hazard: if a fire occurs during a power failure, occupants inside the store cannot open the locked door. The correct specification for a retail storefront entry that needs both access control and after-hours security is a fail-safe electric strike (which allows egress and unlocks on power failure) combined with an Adams Rite deadlock or deadbolt (which provides after-hours security through a mechanical lock that does not depend on power). Browse electric strike parts

Von Duprin Guard-X Exit Alarm for Retail Theft Prevention

Retail employee theft through secondary exits is among the most common and least prevented forms of retail shrinkage. A standard exit device on a stockroom exit or rear receiving door provides code-compliant egress but generates no alarm when used, making it trivially easy for a staff member to walk merchandise out the back door.

The Von Duprin Guard-X (Model 2670) is an exit alarm device designed specifically for this retail application. It is listed for use in restaurants, discount stores, grocery stores, drug stores, clothing stores, and sporting goods stores by Von Duprin. Its critical distinguishing feature compared to standard exit alarms is the non-relatch deadbolt: when the Guard-X push bar is operated, an audible alarm sounds immediately and a deadbolt extends to prevent re-latching. The alarm continues sounding until a staff member with a key resets the device.

Why the Non-Relatch Feature Matters in Retail

A standard exit alarm sounds when the door is opened and stops when the door closes. A thief who uses a rear exit to remove merchandise can take the merchandise out, let the door close (silencing the alarm), and either walk away or re-enter through the front. By the time staff responds to where they thought they heard an alarm, the door appears normal and closed. The Guard-X non-relatch feature prevents this: the alarm keeps sounding and the door cannot re-latch in the normal closed-and-secured position until a staff member with a key goes to that door and resets the device. This makes the Guard-X exit alarm a positive deterrent, not just an egress sensor.

Browse Von Duprin Guard-X exit alarm parts for retail theft prevention at Security Parts.

Retail Security Tiers by Store Type

Standard Retail

Clothing, general merchandise, home goods. Adams Rite deadlatch (store door function) on glass entry. Deadlock added for after-hours. Von Duprin exit alarm on rear exits. Cylindrical storeroom locks on stockroom. Floor concealed closer on glass entry.

Higher-Value Retail

Electronics, sporting goods, liquor stores. Adams Rite hook bolt deadlock after-hours in addition to deadlatch. Restricted cylinder keyway to prevent key duplication. Electric strike with access control and audit trail on entry. Guard-X exit alarms on all secondary exits. Security hinges NRP on all outswing exterior doors.

High-Security Retail

Jewelry, cannabis dispensaries, pharmacies, gun shops. Adams Rite multipoint deadlock with three-point engagement. Concealed door reinforcement. Restricted keyway SFIC cores for rapid rekeying after staff changes. Electric strike with video verification access control. Security bars or secondary locking devices on glass storefront supplementing the mechanical hardware. All hardware ANSI Grade 1.

For all retail hardware categories, browse Schlage ND Series cylindrical lock parts, Von Duprin exit device parts, and Von Duprin exit alarm parts at Security Parts. Contact the team at 845-935-0301 or the contact page for retail hardware specification support.

Why Choose SecurityParts for Retail Door Hardware Parts

Physical incompatibility of cylindrical locks with narrow stile aluminum documented, hook bolt pry attack resistance, Guard-X non-relatch advantage, fail-secure egress violation, and same-day OEM shipping.

Bore Hole Incompatibility

We document the specific dimensional reason cylindrical locks cannot be installed on aluminum narrow stile storefront doors: the 2-1/8 inch bore hole requirement exceeds the 2-inch stile width. This prevents the most common storefront hardware ordering mistake.

Hook Bolt Pry Resistance

We document why hook bolt deadlocks are superior to straight bolt deadlocks on aluminum storefront frames: the hook bolt interlocks with the strike and cannot be cleared by spreading the lightweight aluminum frame, while a straight bolt can be dislodged by the same pry attack.

Guard-X Non-Relatch

We document the specific theft prevention advantage of the Von Duprin Guard-X non-relatch feature over standard exit alarms: the alarm keeps sounding and the door cannot re-latch until staff resets it with a key, preventing the re-entry-and-close evasion used against standard alarms.

Same-Day OEM Shipping

Von Duprin, Schlage, and LCN retail hardware parts ship same day from US warehouses. Call 845-935-0301 or the contact page for retail hardware support.

What Makes Security Parts Different for Retail Hardware Parts

We document the exact dimensional reason cylindrical locks are physically incompatible with aluminum narrow stile storefront frames: 2-1/8 inch bore hole requirement in a 2-inch stile produces less than 1/16 inch of material on each side, which is structurally impossible. This is the most common retail hardware ordering mistake and is not explained at the parts level by any competitor.
We document the hook bolt pry attack resistance mechanism for aluminum storefront after-hours security: the hook bolt interlocks with the strike keeper, preventing clearance by frame spreading, while a straight bolt deadlock can be overcome by spreading the lightweight aluminum frame. For jewelry stores, dispensaries, and high-value retail, this specification difference is the difference between a deterrent and a false sense of security.
We document the Von Duprin Guard-X non-relatch feature as a specific retail theft deterrent advantage: standard exit alarms reset when the door closes, allowing a thief to let the door close after exiting and evade detection. The Guard-X non-relatch keeps the alarm active until a staff member physically responds to that door with a key.
We document the fail-secure electric strike egress code violation on required egress storefront doors, explaining the correct specification (fail-safe electric strike plus mechanical deadlock) for retail operators who want both access control and after-hours security.
We carry Schlage ND Series cylindrical lock parts, Von Duprin exit device parts, Von Duprin Guard-X exit alarm parts, LCN door closer parts, and electric strike parts for the complete retail hardware specification.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Retail Storefront Door Hardware

Why can't standard cylindrical locks be used on aluminum storefront glass doors?

Standard cylindrical locks require a 2-1/8 inch bore hole through the door face. Aluminum narrow stile storefront doors have a stile width of approximately 2 inches. Cutting a 2-1/8 inch bore hole in a 2-inch stile leaves less than 1/16 inch of material on each side, which is structurally impossible. Adams Rite deadlatches and deadlocks are purpose-built for narrow stile aluminum storefront applications, mounting with a mortise pocket in the stile edge rather than a bore hole through the door face. The two product categories are dimensionally incompatible and cannot be substituted for each other.

What is the difference between an Adams Rite deadlatch and a deadlock for retail storefronts?

A deadlatch uses a spring-loaded latchbolt that engages automatically when the door closes, with an anti-shim deadlocking plunger preventing latch manipulation. It is the standard for daytime retail operation. A deadlock uses a full bolt (hook or straight) that must be manually keyed to lock and unlock, providing after-hours security beyond the deadlatch. Hook bolt deadlocks interlock with the strike and resist prying attacks that can spread the aluminum frame to clear a straight bolt. Most retail specifications pair a deadlatch for daytime use with a hook bolt deadlock for overnight security.

Why are floor concealed closers specified for glass storefront doors instead of surface-mounted closers?

Floor concealed closers (OHCC) are entirely hidden within the floor and door bottom rail, leaving only the spindle visible. A surface-mounted closer on a glass storefront door creates visual clutter on a clean glass facade, projects into the door swing path, and can be struck by shopping carts or delivery carts. Floor concealed closers preserve the uncluttered glass appearance that retail architects specify for customer-facing entries while providing the same ADA-compliant closing function. The trade-off is that maintenance requires floor pocket access, which is more involved than adjusting a surface-mounted closer.

When is panic hardware required in a retail store?

Retail stores are classified as mercantile occupancies. Panic hardware is required on egress doors from assembly occupancies meeting the occupant load threshold (50 persons under NFPA 101, 100 persons under IBC for most applications). Most standard retail store floor areas fall below these thresholds when occupant load is calculated using the mercantile load factor. However, retail stores with large square footage or those that regularly host events or large crowds should calculate their occupant load and verify against the adopted code in their jurisdiction before assuming panic hardware is not required.

What is the difference between fail-safe and fail-secure electric strikes on retail storefront doors?

Fail-safe unlocks on power loss: the door is always openable from inside even during power failure, which is required on all egress doors. Fail-secure stays locked on power loss: a mechanical key is required for egress, which is only acceptable on non-egress doors. Installing fail-secure on a required egress storefront entry door is a code violation because occupants could be trapped if power fails. The correct retail specification for access control plus after-hours security is fail-safe electric strike (for egress compliance) combined with an Adams Rite mechanical deadlock (for after-hours security without electrical dependency).

What is the Von Duprin Guard-X exit alarm and where is it used in retail?

The Von Duprin Guard-X (Model 2670) is an exit alarm device with a non-relatch deadbolt: when the push bar is pressed, an alarm sounds and the door cannot re-latch in the secured position until a staff member resets it with a key. Unlike standard exit alarms that reset when the door closes, the Guard-X keeps the alarm active until staff physically responds. It is specified by Von Duprin for discount stores, grocery stores, drug stores, clothing stores, and sporting goods stores to deter employee theft through secondary exits. The non-relatch feature prevents the evade-by-closing technique used against standard alarms.

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Von Duprin 98/99 Series Parts Manual: Rim Exit Device Part Numbers by Configuration and Option Code Tuesday, August 11, 2026

This page is a structured parts reference for the Von Duprin 98/99 series rim exit device. It lists replacement part numbers by configuration and option code, with direct links to SecurityParts.com product pages for every verified live part. For diagnostic guidance, failure analysis, and ordering advice, see the companion Von Duprin 98/99 Series Exit Device Parts and Service Guide.

Browse all 98/99 series replacement parts at SecurityParts.com: Von Duprin 98/99 Series Parts Catalog.

Configuration Reference

The 98/99 series is available in six configurations. Center case part numbers differ by configuration. Confirm the installed configuration before ordering any center case component.

Rim (panic), 98 and 99: Single door or mullion pair. Center case part 109012.
Rim (fire), F-98 and F-99: Fire-rated single door. Center case part 109012.
SVR (panic), 9827 and 9927: Double door, no mullion. Center case part 109358.
SVR (fire), F-9827 and F-9927: Fire-rated double door. Center case part 109358.
CVR, 9847 and 9947: Architectural double door. Model-specific center case.
Mortise, 9875 and 9975: High-security single door. Model-specific center case.

For CVR parts, see the Von Duprin 9847 CVR parts guide and Von Duprin 9947 CVR parts guide. For mortise device parts, see the Von Duprin 7500 mortise lock parts manual.

98/99 Rim Panic Device: Basic Parts

The following parts apply to the standard 98 and 99 series rim panic device. The 98 series has a smooth mechanism case; the 99 series has a grooved case. All internal replacement parts are interchangeable between the 98 and 99 series of the same configuration and manufacture date.

900561. Mounting Package (1-3/4 and 2-1/4 door) (Both door thicknesses included)
090085. 227 5/32" Hex Dog Key, Pack of 10 (Long version; seat fully before rotating)
090005. 227 5/32" Hex Dog Key, Pack of 2 (Long version)
090040. Hex Dogging Shaft, Pack of 2 (Post-1998 devices; see 050709 for pre-1998)
090042. Dogging Adapter Spring, Pack of 2
090043. Dogging Adapter, Pack of 2 (Housing for shaft and spring)
090041. Dogging Spring, Pack of 2
090044. Dogging Hook, Pack of 2
090039. Latch Return Spring, Pack of 10
090038. Rubber Bumper, Pack of 4
050014. Impact Resistant End Cap Kit (Finished item; specify finish)
050524. Impact Resistant End Cap Bracket
090036. Cover Plate Anti-Rattle Spring, Pack of 10
900597. Impact Resistant End Cap Screw Pack (Finished item; specify finish)
968144. 99 Series Mechanism Case, 3-foot door (Finished item; specify finish)
968146. 99 Series Mechanism Case, 4-foot door (Finished item; specify finish)
970191. 98 Series Mechanism Case, 3-foot door (Finished item; specify finish)
970192. 98 Series Mechanism Case, 4-foot door
050529. 98/99 Series Control Link Pin and Retaining Ring
090031. Control Link Pin, Pack of 10
090037. Baseplate Screw, Pack of 10
090073. Mechanism Case Bracket Screw
050491. Shock Absorber and Holder Assembly
090049. Push Bar Guide, Pack of 10

Center Case Assembly Parts

Center case part numbers differ between rim and SVR configurations. Do not interchange rim and SVR center case components.

Von Duprin 050020 Rim Center Case Kit Less Cover. The primary center case for 98/99 rim panic and fire devices. Available at SecurityParts.com.

Center case part numbers differ between rim and SVR configurations. Do not interchange rim and SVR center case components.

050020. 98/99 Rim Center Case Less Cover (Rim panic and fire devices)
050026. Rim Center Case Kit Less Cover (Rim devices)
050071. 98/99 Rim Center Case Cover Kit (Rim devices; finished item; specify finish)
900892. Center Case Cover Screws, Pack of 4 (Finished item; specify finish)
050564. Center Case Cover Bracket
050565. Center Case Reinforcing Bracket
050556. LHR Center Case Cover Kit (Left-hand reverse; finished item)

CD: Cylinder Dogging Option

Von Duprin 090040 Hex Dogging Shaft, Pack of 2. The most frequently replaced dogging component on high-traffic 98/99 devices. Available at SecurityParts.com.

The CD option adds cylinder-controlled dogging. Parts listed apply to rim configurations with the CD option.

107813. Cylinder Dogging Kit
050525. CD/SS Mortise Cylinder Collar Package (Finished item)
050490. Cylinder Locating Washer Package
050526. CD/SS Cylinder Lock Nut Package
090046. CD Dogging Plug, Pack of 2
090045. CD Actuator, Pack of 2
050114. CD Conversion Kit, 99 Series
050132. CD Conversion Kit, 98 Series
050115. Cylinder Dogging Conversion Kit, 99 Series
050117. Hex Dogging Conversion Kit, 98 Series
050589. Fire or Less Dogging Cover Plate Kit, 99 Series (Finished item; specify finish)
050588. Less Dogging / Fire Cover Plate Kit, 98 Series

98/99-F Fire Device: Parts Notes

Fire exit hardware (F-98, F-99, F-9827, F-9927) uses the same basic parts as the panic device with the following distinctions:

Hex dogging is not permitted on fire exit hardware
Channel cover plates for fire devices carry different part numbers from panic versions
The 050589 fire cover plate kit applies to the 99 series; 050588 applies to the 98 series
Mounting package 900561 and all mechanism cases (968144, 968146, 970191) are shared across panic and fire configurations

For fire-rated door hardware requirements, see the commercial door fire rating guide.

98/99-2: Double Cylinder Option

The -2 option adds a second outside key cylinder. Center cases are handed (RHR and LHR). Confirm handing before ordering.

050024. 98/99-2 Center Case Less Cover
050025. 98/99-2 Center Case Less Cover
050027. 98/99-F-2 Center Case Less Cover
050028. 98/99-F-2 Center Case Less Cover
113098. 98/99 Rim Double Cylinder Adapter Assembly
113099. 98/99 Rim Double Cylinder Adapter Assembly
050556. 98/99-2/SD LHR Center Case Cover Kit (LHR; finished item)
050388. 98/99-2 Conversion Kit
900892. Center Case Cover Screws, Pack of 4 (Finished item)

E98/99: Electric Locking Option

The E option adds solenoid-based electric locking to the rim device. Available in fail-safe (FS) and fail-secure (FSE) configurations. Solenoid plungers are handed.

106224. E98/99 Rim Subminiature Switch Assembly
110389. E98/99 Rim Solenoid
050534. EL Potted Circuit Breaker
050539. EL Receptacle Connector
050014. 98/99 Series End Cap Kit (Finished item; specify finish)

SS: Signal Switch Option

050544. SS Cable
050545. SS Housing

RX: Request to Exit Option

050270. RX-2 Switch Kit
050271. RX Auxiliary Switch Kit
050281. RX-LC Low Current Switch Kit
050251. RX Switch Kit

LX: Latch Bolt Monitor Option

050254. LX Switch Kit
050255. LX Switch Kit
050256. LX-RX Switch Kit
050257. LX-RX Switch Kit

CX: Chexit Delayed Egress Option

Chexit devices manufactured before August 24, 2015 use the 050228-series PCB kits (discontinued). Devices manufactured after August 24, 2015 use the 040086-series modules. Confirm the manufacture date before ordering any Chexit PCB kit.

Chexit PCB Kits: Post-August 24, 2015 Devices

040086. 15 Second Release Delay Module
040088. Chexit PCB Kit, 30 Second Release
040089. Chexit PCB Kit, 0 Second Delay Release
040191. CX Field Wiring Cable
040193. CX Motor Control Harness

Chexit PCB Kits: Pre-August 24, 2015 Devices (Discontinued)

050228. Chexit PCB Kit, 15 Second Release (discontinued)
050533. CX Solenoid and Plunger (discontinued)

Chexit Signage

113781. Sign, 15 Second Chexit/DE5300
113782. Sign, 30 Second

QEL and QM: Electric Latch Retraction and Quiet Mechanical Kits

QEL (Quiet Electric Latch Retraction) and QM (Quiet Mechanical) kits convert mechanical 98/99 devices without replacing the device body. Baseplate conversion kits and modular conversion kits are available. Confirm device configuration (rim or SVR) and whether Allegion Connect integration (CON suffix) is required before ordering.

47259560. QM Rim Device Retrofit Kit
47263418. QM SVR Device Retrofit Kit
114317. QEL Modular Conversion Kit
040061. QEL Modular Conversion Kit with CON
958002. HD-QEL Modular Conversion Kit
040062. HD-QEL Modular Conversion Kit with CON

ALK: Exit Alarm Kit

The ALK converts the 98/99 to a battery-powered alarmed exit device. The ALK PCB assembly (111795) is available at SecurityParts.com. Additional ALK components are listed below.

111795. ALK PCB Assembly
050525. ALK Cylinder Collar

Service Replacement Items

Old-Style Dogging Parts (Pre-1998 Devices)

Devices manufactured before 1998 use a different dogging shaft profile. Do not substitute current-spec dogging parts into pre-1998 devices without the conversion kit.

050709. Old Style Hex Dogging Replacement Kit
900397. Metal End Cap Kit (replaces plastic 050014)

Von Duprin 98/99 Series Finish Codes

Finished items in the 98/99 parts list require a finish designation at time of order. Verify the finish code on the installed device before ordering any finished replacement part. Common 98/99 finishes include US3, US10B, US26D, US28, US32, and US32D. Refer to the commercial door hardware finish guide for finish code cross-reference and matching guidance.

Browse All 98/99 Series Parts at SecurityParts.com

Von Duprin 98/99 Series exit device replacement parts at SecurityParts.com. OEM components including center cases, dogging assemblies, end cap kits, mechanism cases, and electrified option kits.

The complete Von Duprin 98/99 series replacement parts catalog, including all verified part numbers above, is available at SecurityParts.com. OEM parts only. Same-day shipping on stocked components.

Von Duprin 98/99 Series Parts Catalog
Von Duprin 98/99 Parts and Service Guide (companion narrative guide: failure analysis, ordering guidance, diagnostic steps)
Von Duprin Parts Catalog (all Von Duprin series)
Exit Device Parts Guide

For parts identification and pre-order support, call 845-935-0301 or visit the SecurityParts.com contact page.

About the Author

This parts reference is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Von Duprin, Schlage, LCN, Falcon, and Detex replacement parts since 2001. Part numbers and product availability are verified against live SecurityParts.com product pages. For parts identification support and same-day shipping availability, call 845-935-0301.

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Commercial Door Hardware for Universities: Campus Key Systems, Residence Hall Security and Exit Device Guide Monday, August 10, 2026

Universities and colleges operate the most hardware-intensive building portfolio of any institution type: academic buildings, residence halls, laboratories, sports arenas, and administrative offices all on one campus, each with distinct hardware requirements. The Schlage SFIC campus master key system is mandated by major universities including the University of Arizona and University of Cincinnati because 10-to-15-second core swaps eliminate the locksmith service calls generated by high faculty and staff turnover. The Clery Act and premises liability law both connect documented door hardware maintenance to institutional liability. Von Duprin exit devices with security indicators, Emergency Security Lockdown, and remote undogging integrate mechanical security with campus access control. Chexit delayed egress is specified on residence hall secondary exits. The propped door premises liability case documents exactly how an unrepaired exit alarm alarm led to a sexual assault lawsuit and why alarm maintenance is a legal obligation, not an option.

A university campus is not one building type: it is a collection of occupancies operating simultaneously, each with different hardware, code, and security requirements. An academic lecture hall has the same panic hardware threshold as a theater. A residence hall has the same propped-door liability exposure as a hotel. A chemistry lab has the same hazardous area hardware requirements as a hospital storage room. Understanding the campus as a portfolio of distinct occupancies is what separates a correct hardware specification from one that generates change orders, inspection failures, and liability claims.

Browse university hardware parts at SecurityParts.com: Schlage ND Series SFIC cylindrical lock parts for campus master key systems, Schlage Everest 29 restricted keyway cylinders for campus key control, Von Duprin 98/99 Series exit device parts with ESL and security indicator options, Von Duprin exit alarm parts for monitored campus secondary exits, and the complete Allegion university and campus hardware catalog.

SFIC required University of Arizona and University of Cincinnati institutional standards both mandate SFIC interchangeable core format on all locks campus-wide

15 sec SFIC core swap time per cylinder for rekeying vs 15-30 minutes per cylinder with conventional cylinder and locksmith

Clery Act Documented failure to maintain campus security infrastructure creates both Clery Act compliance exposure and premises liability exposure in litigation

Propped door United Educators documents a premises liability lawsuit after a broken exit alarm allowed door propping that enabled a sexual assault on campus

The University Campus Hardware Challenge: Six Distinct Occupancy Types on One Site

Most commercial buildings are one occupancy type with consistent hardware needs throughout. A university is six or more occupancy types simultaneously, each with different code requirements and security profiles.

Academic Buildings

Classrooms, lecture halls, offices

Von Duprin exit devices on lecture halls exceeding 50 occupants. Schlage ND Series office functions with SFIC cores. Security indicators for at-a-glance dogging status. ESL lockdown integration for active threat response.

Residence Halls

Dormitories, student housing

Access control on perimeter entries. Chexit delayed egress on secondary fire exits. Von Duprin AD-400 wireless trim for monitored secondary entrances. Exit alarm hardware on fire exits. Propped door monitoring and alarm.

Sports Arenas and Stadiums

Assembly A-4 occupancy, high crowd loads

Von Duprin 98/99 Series exit devices on all egress doors. Fire exit hardware on rated separations. NFPA 101 assembly egress requires panic hardware at 50+ occupant load. After-hours access control on staff entries.

Research Laboratories

Hazardous materials, controlled access

Restricted access cylindrical or mortise locks. Fire-rated doors on hazardous material storage areas. Access control integration for biosafety and chemical safety requirements. SFIC for rapid rekeying when researchers depart.

Administrative Buildings

Business occupancy, office functions

Standard office function cylindrical locks. Restricted keyway cylinders for sensitive areas (HR, payroll, student records). Access control on main entry and after-hours perimeter. SFIC for faculty and staff transitions.

Perimeter Building Entries

All buildings, exterior access points

Card access on primary entrances. Von Duprin AD-400 wireless trim on secondary entrances. Restricted keyway Everest 29 R cylinders for mechanical key backup. Monitored door status for access control audit trail.

Why Universities Mandate SFIC: The Turnover Math That Drives the Standard

The University of Arizona institutional hardware specification explicitly states: "SFIC Interchangeable core function REQUIRED." The University of Cincinnati specification mandates SFIC for research and academic buildings. These are not product preferences: they are operational requirements driven by campus-specific mathematics.

A mid-size university with 400 faculty office locks and 25 percent annual faculty turnover needs to rekey approximately 100 cylinders per year just from faculty departures. Add visiting researchers, adjunct faculty transitions, administrative staff changes, and end-of-year student lab access terminations, and the actual annual rekey count for a medium research university may reach 200 to 400 cylinder changes per year.

Factor	Conventional Cylinder	SFIC Interchangeable Core
Time per rekey	15-30 minutes (remove, repin, reinstall)	10-15 seconds (control key core swap)
Locksmith required	Yes for most campuses	No; facilities staff can rekey
Door open required	Yes, to remove cylinder	No
200 rekeys per year, 30 min each	100 locksmith hours/year minimum	50 minutes total facility staff time
Immediate response to key loss	Wait for available locksmith	Same day, any time, any staff member
Construction keying transition	Locksmith required at each door	Facilities staff swap cores on day of occupancy transfer
Annual cost (200 rekeys)	High: locksmith service calls dominate	Low: core cost only, no service calls

Schlage Everest 29 Restricted Keyways on Campus SFIC Systems

Campus environments have among the highest key duplication abuse rates of any institution type. Students find ways to duplicate keys. Former employees duplicate keys before leaving. Contractors working on campus duplicate site keys. The solution for campus key control is specifying Schlage Everest 29 R (restricted) keyways on SFIC systems. The R keyway blank is not commercially available: cutting a new key requires factory ordering authorization through Allegion's restricted product portal. Unauthorized duplication at a standard key cutting machine is not possible because the blank does not exist in commercial distribution.

Browse Schlage Everest 29 restricted keyway SFIC cylinders and campus key control products at Security Parts.

The Clery Act, Propped Doors, and Premises Liability: The Legal Framework for Campus Hardware Maintenance

The Jeanne Clery Disclosure of Campus Security Policy and Campus Crime Statistics Act (Clery Act) requires colleges and universities receiving federal financial assistance to maintain campus security infrastructure and publish an Annual Security Report. The Clery Act does not specify hardware products. What it creates is a documented compliance framework that connects security infrastructure maintenance to institutional accountability.

When a university documents a security deficiency (a broken alarm, a failed access control reader, a propped door with no monitoring) and fails to correct it, that documentation becomes evidence in two contexts: Clery Act audit findings and premises liability litigation. The combination creates the campus hardware maintenance liability framework that risk managers and facilities directors understand, but that is rarely explained at the hardware parts level.

The Documented Premises Liability Case Every Campus Facilities Manager Should Know

Exit door alarm broken: students report it to campus security multiple times

An external fire door in a residence hall had a non-functional alarm. Students discovered that propping the door open triggered no alarm, and began propping it routinely. The malfunction was reported to campus security on multiple occasions.

Campus security does not repair the alarm

Despite documented reports, the broken exit alarm was not repaired. The propped door became a regular occurrence that campus security was aware of and did not address.

Intruder enters through propped door; student sexually assaulted

An intruder entered the residence hall through the propped-open fire exit. A student was sexually assaulted inside the building.

Lawsuit cites documented negligence in alarm maintenance

The student's lawsuit alleged that the university's documented failure to repair the reported broken alarm constituted negligence, and that this negligence was the proximate cause of the unauthorized access that led to the assault. The reports to campus security created the documentation trail that proved the university knew about the deficiency and did not act.

The hardware maintenance obligation this case creates: When a campus exit alarm or access control system is reported as broken, that report is a documented notice of a security deficiency. Failing to repair it after receiving documented notice is the specific negligence pathway that leads to premises liability. For campus facilities managers, this means every reported door alarm failure, every failed access control reader, and every propped door complaint is a legal notice that starts a repair obligation clock. Annual inspection and testing of all exit alarms and access control system components is not just a best practice: it is the documented maintenance trail that defends against premises liability claims.

Von Duprin Exit Devices for University Academic and Assembly Buildings

University academic buildings generate the full range of Von Duprin exit device specifications: standard push-bar devices for office corridors and classroom doors below the assembly threshold, and panic hardware with advanced options for lecture halls, auditoriums, dining halls, and sports facilities above the threshold.

CDSI / HDSI

Security Indicators: Dogging Status at a Glance

The CDSI (Cylinder Dogging Security Indicator) and HDSI (Hex Dogging Security Indicator) options add a visible indicator on the push-bar side of the exit device that shows whether the device is currently dogged (latch held retracted) or in the secured (latch engaged) state. In academic buildings where staff frequently dog devices during the day for traffic flow and need to verify the locked state at the end of the day, security indicators eliminate the need to physically test each device. A building manager checking the end-of-day state of 20 exit devices can read the status visually from the push-bar side without operating each one.

ESL

Emergency Security Lockdown: Active Threat Response

The Emergency Security Lockdown (ESL) option on Von Duprin QEL (Quiet Electric Latch) exit devices allows the outside trim to be locked instantly by interrupting power to the QEL motor, extending the latch bolt to secure the pull side of the door against unauthorized entry. ESL is triggered by a signal from the campus access control system, a wall-mounted ESL station inside the room, or from a central security command point. The inside push bar remains free for egress at all times. This satisfies the active threat response need (outside trim locked to prevent forced entry) while maintaining code-compliant egress (inside push bar always operable).

Remote Undogging: Campus-Wide Dogging Control

Remote undogging (RU) allows the access control system to retract or return dogging on Von Duprin exit devices across a campus from a central control point. During normal business hours, perimeter exit devices may be in the dogged position for free egress traffic. At building closing time, the access control system sends a remote undogging command that returns all dogged devices to the secured state simultaneously, without requiring a person to walk every device and physically insert a hex key. This is specified at universities where building closing procedures need to be consistent and fast across buildings with dozens of exit devices each.

QEL

Quiet Electric Latch: Access Control Integration on Egress Doors

The Von Duprin QEL (Quiet Electric Latch retraction) exit device retracts the latch bolt electrically on a credential event (card swipe, fob read, mobile credential) from the outside of the door, allowing entry from the outside without operating the outside trim mechanically. The push bar on the inside always retracts the latch mechanically for egress. QEL replaces the need for an electric strike on exit device openings for access control integration, providing a cleaner integration on fire-rated openings where an electric strike would not be the correct hardware.

Browse Von Duprin 98/99 Series exit device parts with ESL, RU, QEL, and security indicator options at Security Parts.

Residence Hall Security: Chexit, Exit Alarms, and Propped Door Monitoring

Von Duprin Chexit for Secondary Residence Hall Exits

Residence hall secondary exits (rear exits, stairwell exterior discharge doors, fire escapes leading to the outside) create a persistent security tension: they must be freely operable for egress but cannot be left open or used as entry points without monitoring. The Von Duprin Chexit delayed egress device addresses this directly. When the push bar is pressed, an audible alarm sounds and the door remains secured for 15 seconds before releasing. Staff in nearby areas or monitored through the access control system can respond to the alarm within the delay window. On fire alarm activation, the Chexit releases immediately without delay.

NFPA 101 Section 7.2.1.6.1 conditions for Chexit specification: the building must be fully sprinklered or have a complete automatic fire detection system, the lock must release immediately on fire alarm, a sign must be posted reading "PUSH UNTIL ALARM SOUNDS. DOOR CAN BE OPENED IN 15 SECONDS," and the audible alarm must sound at the door when force is first applied. Browse Von Duprin Chexit delayed egress exit device parts at Security Parts.

Von Duprin AD-400 Wireless Exit Trim for Monitored Secondary Entrances

Residence halls and academic buildings typically have one or two primary entrances with full card access wiring and one to several secondary entrances where running conduit for power and data would require significant construction disruption in an existing building. The Von Duprin AD-400 Series wireless exit trim eliminates this wiring requirement by communicating with the campus access control system through wireless protocols. The trim is battery-powered and reports door-forced-open and door-held-open alarms to the access control system. Facilities managers receive the same monitoring capability for a secondary entrance that they have on wired primary entrances, without the conduit run cost.

Browse Von Duprin AD-400 wireless exit trim parts for campus secondary entrance monitoring at Security Parts.

Exit Alarm Hardware for Monitored Fire Exits

Residence hall fire exits that are not candidates for Chexit (primary egress routes cannot have delayed egress) or full card access can be monitored with Von Duprin exit alarm versions of their 98/99 Series or 22 Series devices. The exit alarm sounds immediately when the push bar is pressed, alerting staff to any unauthorized use of the fire exit without imposing a delay that would violate egress requirements. Browse Von Duprin exit alarm parts for residence hall fire exit monitoring at Security

Parts.

Campus Construction Keying: The Bitting Exclusion Specific to University Projects

University construction projects face the same construction keying bitting conflict described for school projects, but with a university-specific twist: campus buildings are often renovated in phased summer projects where some sections are occupied and others are under construction simultaneously. This phased occupancy means construction cores and permanent operating cores may coexist in the same building wing during transition periods.

The bitting exclusion requirement is the same: construction key bittings must be explicitly excluded from the permanent system's change key assignment range to prevent a faculty member's permanent office key from accidentally sharing a bitting with a construction core left in place during the phased transition. However, at a university with a campus-wide SFIC master key system, the construction cores and permanent cores are physically different products (construction cores vs operating cores) and are distinguished visually by color coding. The control key hierarchy must still be documented to prevent the construction control key from operating permanent cores or vice versa.

For key system design support, browse Schlage Everest 29 campus key system components and SFIC cores and Schlage ND Series cylinders for campus master key systems at Security Parts. Contact the SecurityParts.com team at 845-935-0301 or the contact page.

Why Choose SecurityParts.com for University Campus Hardware Parts

SFIC turnover math with specific campus calculations, Clery Act maintenance liability connection, propped door negligence case documented, AD-400 wireless trim for secondary entrances, and same-day OEM shipping.

SFIC Turnover Math

We document the specific calculation: 200 rekeying events per year at 30 minutes each equals 100 locksmith hours. At 10-15 seconds each with SFIC, the same 200 rekeying events take under an hour of facilities staff time. This ROI calculation is what campus facilities directors use to justify SFIC upfront cost and is not documented at the parts level by any competitor.

Clery Act Liability Connection

We document the specific connection between Clery Act documented infrastructure maintenance and premises liability defense: a reported, unrepaired security deficiency becomes the documented negligence evidence in litigation. This is the legal framework that makes hardware maintenance a compliance obligation, not an optional best practice.

Propped Door Case

We document the specific United Educators premises liability case where a broken exit alarm led to a propped door, unauthorized entry, sexual assault, and a negligence lawsuit naming the failure to repair as the proximate cause. This is the most important campus hardware liability case and is not documented at the parts level by any competitor.

Same-Day OEM Shipping

Schlage SFIC, Von Duprin exit device, and campus hardware parts ship same day from US warehouses. Call 845-935-0301 or the contact page for campus specification support.

What Makes Security Parts Different for University Hardware Parts

We document the university SFIC turnover math with specific numbers: 200 annual rekeying events at 30 minutes each equals 100 locksmith hours per year with conventional cylinders. SFIC reduces the same 200 events to under an hour of facilities staff time. This is the calculation university facilities directors use to justify SFIC specification on every new project and renovation.
We document the United Educators premises liability case where a broken exit alarm in a residence hall, reported multiple times and not repaired, allowed a propped door that enabled a sexual assault. The lawsuit named the documented failure to repair as the proximate cause. This is the specific legal pathway that makes exit alarm maintenance a liability obligation on every campus.
We document the Clery Act maintenance connection: documented failure to maintain access control infrastructure creates both Clery Act compliance exposure and premises liability defense vulnerability. Timestamped maintenance records are not just operational good practice; they are the legal documentation trail that defends against negligence claims.
We document the university-specific phased occupancy construction keying challenge, where SFIC construction cores and permanent cores coexist in the same building wing during summer renovations and the control key hierarchy must prevent construction keys from operating permanent cores.
We carry Schlage ND Series SFIC cylindrical lock parts, Schlage Everest 29 restricted keyway campus systems, Von Duprin exit device parts with ESL, RU, QEL, and Chexit options, and exit alarm parts for the complete campus hardware specification.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About University Campus Door Hardware

Why do universities mandate SFIC interchangeable cores instead of conventional cylinders?

SFIC reduces rekeying time from 15-30 minutes per cylinder (with locksmith) to 10-15 seconds per cylinder (control key swap, no locksmith needed). A university with 200 annual rekeying events from faculty and staff turnover spends over 100 locksmith hours per year with conventional cylinders. SFIC reduces that to under an hour of facilities staff time. Major universities including the University of Arizona and University of Cincinnati mandate SFIC in their institutional hardware specifications for this operational reason. Paired with Schlage Everest 29 R restricted keyways, SFIC also prevents unauthorized key duplication that is common in campus environments.

How does the Clery Act relate to campus door hardware and access control maintenance?

The Clery Act requires documented campus security infrastructure maintenance and an Annual Security Report. It does not specify products, but creates a compliance framework where documented failure to maintain security hardware becomes evidence in both Clery Act audits and premises liability litigation. A reported, unrepaired broken exit alarm or failed access control reader is documented notice of a deficiency that creates repair obligation. Timestamped maintenance records for lock inspections, alarm tests, and repair work are the legal documentation trail that defends against negligence claims when a security incident follows a hardware failure.

What happened in the residence hall propped door premises liability case?

A residence hall external fire door alarm was broken and non-functional. Students reported it to campus security multiple times. Campus security did not repair it. Students began propping the door open without triggering any alarm. An intruder entered through the propped door and sexually assaulted a student. The student's lawsuit alleged that the university's documented failure to repair the alarm after multiple reports constituted negligence, and that negligence was the proximate cause of the assault. The case establishes the specific liability pathway: reported deficiency, no repair, unauthorized access, incident, lawsuit naming the failure to repair.

What Von Duprin exit device features are specified for university buildings?

Universities specify four key options beyond standard exit devices. Security indicators (CDSI/HDSI) show dogging status at a glance from the push-bar side, eliminating the need to physically test each device at day's end. Emergency Security Lockdown (ESL) instantly locks the outside trim against unauthorized entry while leaving the inside push bar free. Remote undogging (RU) allows the access control system to simultaneously return all dogged devices to secured state at building closing. Quiet Electric Latch (QEL) retracts the latch on credential events for access control integration on fire-rated exit device openings without an electric strike.

What is the Von Duprin AD-400 wireless exit trim and why is it specified on campus secondary entrances?

The AD-400 is wireless exit trim for Von Duprin exit devices that communicates with the campus access control system without power and data wiring runs. Battery-powered and wireless, it provides door-forced-open and door-held-open alarms to the access control system for secondary building entrances where running conduit would be expensive or disruptive. Campus facilities managers get the same monitoring capability for secondary entrances as for wired primary entrances, without the construction cost.

When is the Von Duprin Chexit delayed egress specified on campus residence hall doors?

Chexit is specified on residence hall secondary exits and fire exits that are not primary egress routes, where the security goal is monitoring and deterring unauthorized entry while maintaining code-compliant egress. When pressed, Chexit holds the door 15 seconds while an alarm sounds, then releases. On fire alarm it releases immediately. NFPA 101 Section 7.2.1.6.1 conditions apply: the building must be fully sprinklered or have complete automatic fire detection, immediate release on fire alarm, required signage, and an audible alarm at the door. Chexit is never specified on primary egress routes.

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Commercial Door Hardware for Multifamily Residential Buildings: Apartment Entry Locks, Fire Doors and Code Requirements Friday, August 7, 2026

Multifamily residential buildings (IBC Group R-1 and R-2) have layered hardware requirements across four distinct door zones: apartment entry doors, corridor fire doors, stairwell doors, and common area egress doors. Apartment entry doors may have a second security device (deadbolt, security chain) in addition to the standard latch, but the two must be operable sequentially, not simultaneously. The Schlage CS210 interconnected lock solves the deadbolt-plus-latch requirement on a single device by retracting both with one inside lever rotation. Corridor doors in R-2 sprinklered buildings typically require 20-minute fire door assemblies. The Fair Housing Act mandates lever hardware on accessible units. Common areas meeting the 50-person assembly occupancy threshold require Von Duprin exit devices on all egress doors.

A multifamily building with 100 apartments has at least 100 apartment entry doors, 100 corridor doors, multiple stairwell doors, and common area egress doors, each governed by overlapping but distinct code requirements. Specifying the same hardware for all of them is the wrong approach. Specifying the right hardware for each zone is what keeps tenants safe, keeps the property code-compliant, and reduces the maintenance and replacement calls that follow from under-specified hardware on a high-use building.

Browse multifamily hardware parts at SecurityParts.com: Schlage CS210 interconnected lock parts for apartment entry doors, Schlage ND Series cylindrical lock parts for corridor and common area doors, Schlage deadbolt parts for apartment entry security, Von Duprin exit device parts for multifamily common areas, LCN door closer parts for corridor fire doors, and the complete Allegion multifamily hardware catalog.

2 operations Maximum allowed for apartment entry doors under IBC and NFPA 101 (latch plus one additional security device, not simultaneous)

20 min Typical fire door rating for R-2 corridor doors in fully sprinklered multifamily buildings under the IBC

1991 Date after which multifamily buildings with 4+ units must meet Fair Housing Act design requirements including lever hardware on accessible units

50 persons NFPA 101 assembly occupancy panic hardware threshold applicable to multifamily common areas (lobbies, amenity rooms, clubhouses)

The Four Door Hardware Zones in a Multifamily Building

Every multifamily building has four hardware zones, each with different requirements. Treating them as one specification creates either over-specified expensive hardware in low-risk zones or under-specified hardware that fails inspection in high-risk zones. Understanding the distinction between zones is the starting point for any multifamily hardware specification.

Zone 1: Apartment Entry Doors

Dwelling unit entries from corridors

Covered by the IBC/NFPA 101 two-operation exception allowing a deadbolt or security chain in addition to the primary latch. Must allow egress without a key. Fair Housing Act lever requirement applies on accessible units. Interconnected locks are the standard specification for combining latch and deadbolt in one device with single-motion egress.

Zone 2: Common Corridor Fire Doors

Walls between corridors and tenant spaces

Typically 20-minute fire door assemblies in fully sprinklered R-2 buildings. Must be self-closing and positive-latching. All hardware must be fire-listed for the assembly rating. Hold-open devices must be automatic-closing on fire alarm. Corridor doors in non-sprinklered buildings may have higher ratings.

Zone 3: Stairwell Enclosure Doors

Exit enclosure entry from corridors

60-minute (in 1-hour enclosures) or 90-minute (in 2-hour enclosures) fire door assemblies. Self-closing, positive latching. Stairwell reentry requirements apply for buildings over 4 stories. Exit devices with fire exit hardware listing where the stair serves assembly occupancy common areas. IBC simultaneous unlock requirements for electrically-locked stair doors.

Zone 4: Common Area Egress Doors

Lobbies, amenity rooms, clubhouses, fitness centers

Assembly occupancy rules apply when the occupant load meets the panic hardware threshold (50 persons NFPA 101, 100 persons IBC for some applications). Von Duprin exit devices required on all egress doors above the threshold. Access control integration common for after-hours security with access-controlled egress hardware.

Apartment Entry Doors: The Two-Operation Exception and Its Limits

The general rule in both the IBC and NFPA 101 is that all latches on a means of egress door must be releasable by a single releasing operation from the egress side. Apartment entry doors have a specific exception to this rule that allows a second security device, which is why apartment doors can legally have both a standard latch and a separate deadbolt.

IBC Section 1010.2.4(5)

Doors from individual dwelling or sleeping units of Group R occupancies having an occupant load of 10 or less are permitted to be equipped with a night latch, dead bolt or security chain, provided such devices are openable from the inside without the use of a key or tool.

Key limits: Group R occupancy only. Occupant load 10 or fewer per unit. No key or tool required for egress from inside. Mounting height per ADA (34 to 48 inches AFF) implied by accessibility cross-reference.

NFPA 101 Section 7.2.1.5.3.4

Egress door assemblies from individual living units and guest rooms of residential occupancies shall be permitted to be provided with devices, including automatic latching devices, that require not more than one additional releasing operation, provided that such device is operable from the inside without the use of a key or tool and is mounted at a height not exceeding 48 inches above the finished floor.

Key limits: Residential occupancy. One additional releasing operation only. No key or tool. Maximum mounting height 48 inches AFF explicitly stated.

The two-operation code gap that the model codes have not fixed as of the 2024 editions: Both the IBC and NFPA 101 allow a second security device on apartment entry doors. Both require that the second device be operable from inside without a key or tool. What neither code explicitly states is that the two operations (releasing the latch and releasing the second device) must be sequential rather than simultaneous. An apartment entry door where the knob and thumbturn deadbolt are positioned so that both hands must operate them at the same time technically has both devices operable without a key, but is functionally inaccessible for any person with limited hand strength, one-hand limitation, or who is carrying anything. The accessibility standards (ADA and ICC/ANSI A117.1) require one-hand operation, which implicitly prohibits simultaneous two-handed arrangements. However, the life safety code itself does not make this explicit. As of the 2024 model code editions, this gap remains unaddressed. The practical enforcement mechanism is the accessibility standard cross-reference, not the life safety code text.

The Schlage CS210 Interconnected Lock: Single-Motion Egress With Deadbolt Security

The Schlage CS210 interconnected lock is the purpose-built product for apartment entry doors where both deadbolt security and code-compliant single-motion egress are required in one device. Its defining mechanism is the interlock between the latch bolt and the deadbolt: when the inside lever is rotated, both the latch bolt and the deadbolt retract simultaneously, requiring only one hand motion to exit.

Schlage CS210 Series: Technical Specifications

Grade

ANSI/BHMA A156.2 Grade 2

Available function

Entrance only (CS210 entrance function)

Egress mechanism

Single inside lever rotation retracts both latch and deadbolt simultaneously

Outside entry

Key required to retract deadbolt when door is closed; lever retracts latch only from outside

Backset

2-3/4 inch standard; adjustable to 5-1/2 inch for wider doors

Door thickness

1-3/8 inch to 1-3/4 inch

Lever options

Broad lever selection; no trim-only or keyed-different options

Replaces

Schlage S200 Series (discontinued); direct drop-in for most S200 installations

Cylinder type

Conventional 5-pin; compatible with Schlage C keyway and master keying

When the CS210 Satisfies the Two-Operation Exception

Because the CS210's single inside lever rotation retracts both the latch and deadbolt, it does not actually require two operations for egress. This makes it more compliant than the two-operation exception allows: it satisfies the general single-operation requirement and does not need to rely on the two-operation dwelling-unit exception at all. For apartment entry doors where the property manager wants deadbolt security but must also meet ADA single-hand requirements on accessible units, the CS210 is the optimal specification because it satisfies both simultaneously without relying on the exception.

Browse Schlage CS210 interconnected lock parts and replacement components at Security Parts.

Corridor Fire Door Requirements in R-2 Multifamily Buildings

Corridor doors in multifamily residential buildings are the passive fire protection layer between tenant living spaces and the building's exit access corridors. In a fire, a closed corridor door delays smoke and flame travel from a unit into the corridor, preserving the corridor as a usable escape path for other occupants. This is why corridor door hardware requirements are not optional: they determine whether the corridor remains passable during a fire event.

Fire Rating: Why Most Multifamily Corridor Doors Are 20-Minute, Not Higher

Under the IBC, the required fire protection rating of a corridor door assembly is determined by the required fire resistance rating of the corridor wall. In fully sprinklered R-2 multifamily buildings, the IBC generally requires a 20-minute fire door assembly for corridor doors in 1-hour corridor wall construction. This is the most common configuration in new multifamily construction. Non-sprinklered buildings or buildings with 2-hour corridor walls require higher-rated assemblies.

The 20-minute fire rating is significantly less demanding than stairwell doors, which require 90-minute ratings in 2-hour enclosures. However, all fire-rated corridor doors must still carry proper fire labels, be installed per NFPA 80 requirements, and be subject to NFPA 80 annual inspection even at the 20-minute rating.

Self-Closing Requirements on Corridor Doors

All fire-rated corridor doors in multifamily buildings must be self-closing or automatic-closing. This is a consistent NFPA 80 and IBC requirement that applies at every fire rating level. Residents propping corridor doors open is one of the most prevalent fire safety violations in apartment buildings and one of the most common cited deficiencies during fire inspections.

Hold-open devices connected to the fire alarm system (LCN 4040SE Sentronic) are the code-compliant solution for corridor doors where the property management team needs them to stay open for resident convenience during the day. Non-listed friction hold-open arms on fire-rated corridor doors do not comply with NFPA 80 Section 6.6.1 automatic-release requirements.

Browse LCN door closer and Sentronic hold-open parts for multifamily corridor doors at Security Parts.

Fair Housing Act Door Hardware Requirements

The Fair Housing Act (FHA) of 1988 requires that multifamily residential buildings with four or more dwelling units built after March 13, 1991 meet specific design and construction requirements for units on the ground floor and in elevator-accessible buildings. These requirements are intended to make covered units accessible to people with disabilities, including people who use wheelchairs, walkers, or have limited hand strength or dexterity.

The FHA's design and construction requirements reference the ICC/ANSI A117.1 Accessible and Usable Buildings and Facilities standard for specific technical requirements. For door hardware, the FHA requirement translates directly to lever hardware requirements on covered dwelling unit entry doors and interior doors within covered units.

Which Buildings and Units Must Comply

All ground-floor units in buildings without elevators with 4 or more units (built after March 13, 1991)
All units in buildings with elevators with 4 or more units (built after March 13, 1991)
Common areas and public and common use areas serving covered units
All doors intended to be used by residents with accessible routes from the building entrance must have accessible hardware

What FHA-Compliant Door Hardware Means in Practice

Round knobs are not compliant on FHA-covered apartment entry doors or interior doors within covered units. The ADA Standards and ICC/ANSI A117.1 require hardware operable with one hand without tight grasping, pinching, or twisting of the wrist. This standard is satisfied by lever handles, push/pull hardware, and loop pulls, but not round knobs. Property developers or managers who install knob hardware on FHA-covered units face potential Fair Housing Act liability, which is enforced by the Department of Housing and Urban Development (HUD) and by private lawsuits.

The FHA requirement that many apartment building managers miss during renovation: The Fair Housing Act design and construction requirements apply not just to new construction but to substantial alterations that affect the ground-floor units or the accessible route. When a multifamily property manager replaces hardware throughout an FHA-covered building as part of a renovation project, they must use lever hardware on all accessible unit entry doors and interior doors, even if the original construction used knob hardware and was never cited. The renovation is the triggering event that requires bringing the hardware into compliance. Installing replacement knobs during a renovation of an FHA-covered building creates fresh FHA liability.

Browse Schlage ND Series lever cylindrical lock parts for FHA-compliant multifamily hardware at Security Parts.

Hardware Specification Matrix by Door Zone

Door Zone	Fire Rating	Self-Closing	Standard Hardware	Key Products
Apartment entry (accessible unit)	As required by wall rating (often none)	Not required	Interconnected lock (latch + deadbolt, single-motion egress); lever; ADA-compliant	Schlage CS210 parts
Apartment entry (non-accessible unit)	As required by wall rating	Not required	Cylindrical lock + separate deadbolt; or interconnected lock; two operations permitted	Schlage deadbolt parts
Corridor fire door (20-min, sprinklered)	20-minute	Required	Fire-listed closer; positive-latching cylindrical or mortise lock; NRP hinges; smoke seal	LCN closer parts
Stairwell enclosure door	60-90 minute	Required	Fire exit hardware or lever; UL 10C closer; reentry hardware (fail-safe) if over 4 stories	Von Duprin fire exit device parts
Building lobby exterior	None (exterior)	Often required	Closer; access control entry (electrified strike or mag lock); panic hardware if 50+ occupants	Electric strike parts
Amenity room, clubhouse, fitness center	Per wall rating	Per wall rating	Von Duprin exit devices if occupant load 50+; access control on entry side	Von Duprin exit device parts

Common Area Exit Devices: When Von Duprin Is Required in Apartment Buildings

Many multifamily property managers are surprised to learn that their building's amenity spaces may require Von Duprin exit devices on the same rules as a commercial office building or school. The reason is occupancy classification: the IBC and NFPA 101 classify occupied spaces by use, not by the type of building they are located in.

A fitness center in an apartment building is an assembly occupancy. A clubhouse used for community events is an assembly occupancy. A rooftop terrace accessible to residents is an assembly occupancy. When any of these spaces reaches an occupant load of 50 or more (NFPA 101) or 100 or more (IBC for assembly occupancies), panic hardware is required on all egress doors. The property's R-2 residential classification does not apply to these spaces; their own use classification controls.

The occupant load calculation uses the assembly load factor from IBC Table 1004.5: concentrated use (chairs only) at 7 square feet per person, or unconcentrated use (tables and chairs) at 15 square feet per person. A 750-square-foot clubhouse with table and chair seating has a calculated occupant load of 50 persons, exactly at the NFPA 101 panic hardware threshold. When in doubt, calculate the occupant load before assuming that panic hardware is not required in an amenity space.

Browse Von Duprin 98/99 Series exit device parts for multifamily common area egress doors at SecurityParts.com. For specification support, contact the team at 845-935-0301 or the contact page.

Why Choose Security Parts for Multifamily Residential Hardware Parts

Two-operation code gap documented, CS210 over-performance on the exception, FHA renovation liability explained, amenity space occupant load calculation, and same-day OEM shipping.

Two-Operation Code Gap

We document the specific gap in the IBC and NFPA 101: neither code explicitly requires that the two apartment entry operations be sequential rather than simultaneous. The accessibility standard is the practical enforcement mechanism, not the life safety code, and this gap remains unaddressed in the 2024 editions.

CS210 Over-Performance

We document that the Schlage CS210 does not require the two-operation exception because its single inside lever rotation satisfies the single-operation general requirement, making it compliant on accessible units without relying on the exception. No competitor explains this at the parts level.

FHA Renovation Liability

We document the FHA substantial alteration trigger: renovating an FHA-covered building requires bringing hardware into lever compliance, even if original construction used knobs and was never cited. Installing knob replacements during renovation creates fresh FHA liability.

Same-Day OEM Shipping

CS210, Schlage deadbolt, Von Duprin exit device, and LCN closer parts ship same day from US warehouses. Call 845-935-0301 or the contact page for multifamily specification support.

What Makes Security Parts Different for Multifamily Hardware Parts

We document the two-operation code gap: the model codes allow a second security device on apartment entry doors but do not explicitly require the two operations to be sequential rather than simultaneous. The accessibility standard fills this gap practically, but the life safety code itself does not address it, and this remains true in the 2024 editions.
We document why the Schlage CS210 is superior to specifying a separate latch and deadbolt on accessible apartment entry doors: the CS210's single-motion egress mechanism means it does not need to rely on the two-operation exception at all, making it automatically compliant for both the life safety code and the ADA single-hand operation requirement.
We document the FHA substantial alteration trigger for lever hardware compliance during renovation, explaining why replacing knobs with knobs during a building renovation creates fresh Fair Housing Act liability even if the original installation was never cited.
We document the assembly occupancy occupant load calculation for multifamily amenity spaces and show how a 750-square-foot clubhouse reaches the NFPA 101 50-person panic hardware threshold, explaining why exit devices can be required in apartment building common areas.
We carry Schlage CS210 interconnected lock parts, Schlage deadbolt parts, Schlage ND Series lever cylindrical lock parts, Von Duprin exit device parts, and LCN door closer parts for all multifamily hardware zones.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Multifamily Residential Door Hardware

Can an apartment entry door have both a latch and a separate deadbolt?

Yes, under specific conditions. IBC Section 1010.2.4(5) and NFPA 101 Section 7.2.1.5.3.4 both allow apartment entry doors in residential occupancies to have a second security device (deadbolt, night latch, or security chain) in addition to the standard latch. The device must be operable from inside without a key or tool, and must not exceed 48 inches above the finished floor. The two devices must be operable sequentially rather than simultaneously, though this is enforced through accessibility standards rather than explicitly stated in the life safety code. The Schlage CS210 interconnected lock satisfies both the security need and the single-hand operation requirement in a single device.

What is the Schlage CS210 interconnected lock and why is it used on apartment entry doors?

The Schlage CS210 is a Grade 2 interconnected lock combining a cylindrical latch and a deadbolt that retract together on a single inside lever rotation. This single-motion egress satisfies IBC and NFPA 101 egress requirements while providing deadbolt security, making it ideal for apartment entry doors. It is available exclusively in the CS210 entrance function with a broad lever selection, uses a 2-3/4 inch backset adjustable to 5-1/2 inches, and replaces the discontinued Schlage S200 Series as a direct installation match on most prior S200 openings.

What fire door rating is required for corridor doors in R-2 apartment buildings?

In fully sprinklered R-2 multifamily buildings under the IBC, corridor doors in 1-hour corridor wall construction typically require 20-minute fire door assemblies. Non-sprinklered buildings or 2-hour corridor walls require higher ratings. All corridor fire doors must be self-closing, positive-latching, and comply with NFPA 80 installation and annual inspection requirements. Hold-open devices must be automatic-closing on fire alarm. The 20-minute rating is less demanding than stairwell doors but still requires fire-labeled hardware on all components.

Does the Fair Housing Act apply to door hardware in apartment buildings?

Yes. The FHA applies to multifamily buildings with 4 or more units built after March 13, 1991. All ground-floor units (in non-elevator buildings) and all units (in elevator buildings) must meet FHA design and construction requirements, which include lever hardware operable with one hand. Round knobs are non-compliant on covered units. The FHA substantial alteration trigger means that replacing hardware during a renovation requires lever compliance even if the original construction used knobs. HUD enforces FHA compliance and private lawsuits are also available to affected residents.

When are exit devices (panic hardware) required in multifamily residential common areas?

Exit devices are required when multifamily common areas qualify as assembly occupancies meeting the panic hardware occupant load threshold: 50 persons under NFPA 101. Fitness centers, clubhouses, lobby spaces, rooftop terraces, and amenity rooms are classified by their use, not by the building's R-2 designation. A 750-square-foot clubhouse with tables and chairs has a calculated occupant load of 50 persons under IBC Table 1004.5, reaching the NFPA 101 threshold. All egress doors from that space require Von Duprin exit devices.

What is the two-operation code gap in apartment entry door security devices?

The IBC and NFPA 101 allow a second security device on apartment entry doors but do not explicitly require sequential rather than simultaneous operation. An apartment entry where knob and thumbturn are positioned for simultaneous two-handed operation technically has both devices operable without a key, but is functionally inaccessible. The accessibility standards (ADA and ICC/ANSI A117.1) implicitly prohibit simultaneous two-handed arrangements by requiring one-hand operation, but the life safety code does not make this explicit. As of the 2024 model code editions, this gap has not been explicitly resolved.

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Commercial Door Hardware for High-Rise Buildings: Stairwell Reentry, IBC vs NFPA 101 and Exit Device Requirements Thursday, August 6, 2026

Stairwell reentry requires that building occupants can open stair-side doors and exit the stairwell if it becomes smoke-filled. The IBC and NFPA 101 differ: the IBC requires simultaneous remote unlocking from the fire command center or main entrance (2024 edition now also requires fire alarm release and power-failure release); NFPA 101 requires automatic release on fire alarm and allows selected reentry, which the IBC does not. Fail-safe electric strikes cannot be used on fire-rated stairwell doors: the code requires unlocking without unlatching, and a fail-safe electric strike retracts the keeper and removes positive latching. The correct hardware is fail-safe electrified lever trim for Von Duprin exit devices, or a fail-safe lockset. High-rise buildings with electrically-locked stair doors also require a two-way communication system at every fifth floor of the stairwell.

High-rise buildings present door hardware challenges that do not exist in low-rise construction. The stairwell is the primary means of vertical evacuation, but in a fire it can fill with smoke fast enough to trap occupants. The hardware on every stair door is the mechanical mechanism that determines whether those occupants can get out or not. Getting it wrong is not a code violation that generates a correction notice: it is the specific scenario that killed six people in a Chicago stairwell in 2003.

Browse high-rise and stairwell reentry hardware at SecurityParts.com: Von Duprin 33A 98/99 Series exit devices with electrified trim for stairwell reentry, Von Duprin complete parts catalog, electric strike parts for non-fire-rated applications, Schlage fail-safe cylindrical lock parts, and the complete Allegion high-rise hardware catalog.

6 deaths Cook County Administration Building fire, Chicago 2003: occupants trapped in stairwell with mechanically-locked stair-side doors

Every 5th floor IBC two-way communication requirement in high-rise buildings with electrically-locked stair doors: telephone to constantly attended station

3 triggers 2024 IBC requires simultaneous unlock on all three: fire command center signal, fire alarm activation, and power failure

Prohibited Fail-safe electric strikes on fire-rated stairwell doors: retract the keeper, remove positive latching, violate unlock-without-unlatching requirement

The History That Made Stairwell Reentry a Code Requirement

On October 17, 2003, a fire broke out in a storage room on the 12th floor of the Cook County Administration Building in Chicago. Six employees died. They were not overcome by flames: they were trapped in a stairwell. The stair-side doors on multiple floors were mechanically locked, which was common building security practice at the time to prevent unauthorized access to tenant floors from the stairwell. When the occupants entered the stairwell and found the stair-side doors locked on multiple floors, they could not exit the stairwell to reach safety. The stairwell filled with smoke.

This event, combined with earlier stairwell entrapment deaths, drove model code changes that tightened stairwell reentry requirements significantly. The IBC progressively tightened the requirements from the 2003 edition through the 2024 edition. NFPA 101 had required fire-alarm-triggered automatic release since earlier editions. Both codes now require that locked stair-side doors be unlockable remotely, automatically, or both, so that occupants can exit a compromised stairwell regardless of whether a security system is active.

IBC vs NFPA 101: How Stairwell Reentry Requirements Differ

International Building Code (IBC)

Most widely adopted in commercial construction

Release trigger (2018 and earlier)

Signal from fire command center, if present, or by emergency personnel from a single location inside the main entrance. Fire alarm activation was NOT a required trigger in earlier IBC editions.

Release trigger (2024 edition)

Now requires all three: fire command center/main entrance signal, fire alarm activation, AND power failure. Aligns with NFPA 101 and codifies fail-safe hardware practice.

Selected reentry

NOT PERMITTED. IBC requires all stair-side doors to be non-locking or remote-unlockable. No selected reentry option.

Mechanical locks on 4 stories or fewer

NOT PERMITTED in recent editions. Only the 2003 IBC edition allowed mechanical locks for stairs serving 4 stories or fewer. All later editions require fail-safe remote release.

High-rise communication

REQUIRED. Every fifth floor must have a telephone or two-way communication device connected to a constantly attended location when stair-side doors are electrically locked in a high-rise building.

NFPA 101 Life Safety Code

Required for some occupancies; some states adopt instead of IBC

Release trigger

Automatic release actuated by initiation of the building fire alarm system. NFPA 101 has required fire-alarm-triggered release for multiple editions, ahead of the IBC.

Selected reentry

PERMITTED under specific conditions: at least two stair-side doors in the stairwell must allow reentry; no more than four locked floors between reentry levels; the top floor or next-to-top floor must allow reentry with access to another exit; required signage on both locked and unlocked doors.

Mechanical locks on 4 stories or fewer

PERMITTED. NFPA 101 allows mechanical (non-electrified) locking of stair-side doors in stairs serving four stories or fewer, with no remote release required. The IBC does not allow this exception in recent editions.

UL 294 / UL 1034 listing (2024 edition)

New requirement in NFPA 101 2024: all new electromechanical or electromagnetic locking hardware on stairwell doors must be listed to UL 294 or UL 1034.

The IBC vs NFPA 101 jurisdiction mistake that creates non-compliant stairwell hardware: Specifiers who look up "stairwell reentry requirements" and find NFPA 101 selected reentry rules (which are widely published) may apply them on a project where the IBC is the adopted code. The IBC does not allow selected reentry. A high-rise building in an IBC jurisdiction specified with selected reentry hardware will have mechanically-locked stair-side doors that do not comply with the IBC requirement for simultaneous unlocking. Verifying which code is adopted in the project jurisdiction before specifying stairwell door hardware is the essential first step.

Why Fail-Safe Electric Strikes Cannot Be Used on Fire-Rated Stairwell Doors

This is the most common technical mistake in stairwell reentry hardware specification, and understanding the exact mechanism prevents it.

Both the IBC and NFPA 101 require that stairwell doors be capable of being unlocked without unlatching. The latch bolt must remain extended and engaged in the strike even while the lever or trim on the stair side is in the unlocked condition. This requirement exists because fire doors must maintain positive latching to resist fire pressure: a fire pushing against the latch-side face of the door must encounter a mechanically engaged latch bolt that holds the door closed.

A fail-safe electric strike works by retracting the strike keeper when power is lost or when an unlock signal is sent. When the keeper retracts, the latch bolt has no surface to engage against. The door is technically closed, but the latch bolt is not positively held in any strike. Under the pressure differential created by a fire on one side of the door, this unlatched door can be pushed open.

Fail-Safe Electrified Lever Trim

Von Duprin electrified trim on 98/99 Series or 33A Series exit devices. The trim lever on the stair side is electrically held locked in normal operation. On unlock signal or power failure, the lever becomes operable. The exit device latch bolt remains extended and engaged in the strike throughout.

Satisfies both the unlock and the without-unlatching requirements simultaneously.

Prohibited on Fire Doors

Fail-Safe Electric Strike

Retracts the keeper on unlock signal or power failure. Removes the mechanical engagement between the latch bolt and the strike. The door is no longer positively latched. Fire pressure can push the door open against the unretained latch bolt.

Cannot maintain positive latching during fire conditions. Prohibited on fire-rated stairwell doors.

Fail-Safe Lockset or Mag Lock + Passage Set

A fail-safe lockset unlocks the lever electrically while the latch bolt remains extended. Alternatively, a magnetic lock on the stair side paired with passage hardware and a motion sensor on the egress side can work, but requires additional code compliance verification (sensor, manual override button, fire alarm release, power failure release).

The fail-safe electric strike prohibition mechanism that most specifiers know but few can explain: Many hardware specifiers know that fail-safe electric strikes cannot be used on stairwell fire doors and state it as a rule. Very few can explain the specific mechanism: the keeper retraction removes positive latching, and the code specifically requires unlocking without unlatching because fire pressure can exploit the unretained latch bolt even before the door swings open. Understanding the mechanism makes it easier to evaluate edge cases and alternatives and to explain the requirement to owners or contractors who push back on the cost of electrified exit device trim. Browse Von Duprin electrified exit device trim for stairwell reentry applications at Security Parts.

The 2024 IBC Three-Trigger Requirement: What Changed

Pre-2024 IBC

Single trigger: fire command center or main entrance signal

Earlier IBC editions only required that stairwell doors be capable of simultaneous unlocking by a signal from the fire command center (if present) or by emergency personnel from the main entrance. If the fire department had not arrived and no one was at the command center, the doors stayed locked. Power failure did not unlock them unless fail-safe hardware was specified voluntarily.

2024 IBC

Three triggers: command center, fire alarm activation, power failure

The 2024 IBC added fire alarm signal activation and power failure as additional required unlock triggers. Any one of the three conditions must independently cause simultaneous unlocking of all electrically-locked stairwell doors. This aligns the IBC with NFPA 101's fire-alarm-activated requirement and codifies the industry practice of specifying fail-safe hardware, making fail-safe specification mandatory under the 2024 edition.

The practical consequence for hardware specification is that on projects where the 2024 IBC is adopted, specifying fail-safe hardware for stairwell reentry is no longer just best practice: it is a code requirement. Fail-secure hardware (which fails locked, maintaining positive latching on power loss) cannot be used for the stair-side locking mechanism on a stairwell reentry door where the 2024 IBC applies.

High-Rise Building Stairwell Communication System Requirement

The IBC imposes a communication requirement that goes beyond the door hardware itself for high-rise buildings with electrically-locked stairwell doors. A telephone or two-way communication device must be provided at every fifth floor of the stairwell, connected to a constantly attended location (the fire command center, security desk, or other continuously staffed station).

The purpose is to allow an occupant who is inside the stairwell and cannot exit (because the doors are locked and the remote unlock has not yet been activated) to call for help. This is the scenario the Cook County Administration Building occupants faced in 2003: the stairwell doors were locked, no one had remotely released them, and the occupants had no way to communicate their location to building staff or first responders.

The two-way communication requirement that is separate from the unlocking hardware: Many high-rise stairwell reentry hardware specifications correctly address the unlocking requirement (fail-safe electrified trim, fire alarm interface) but do not address the communication system requirement. The two-way communication system is a separate code requirement that must be coordinated between the door hardware specification (Division 8) and the communications specification (Division 27 or Division 28). The hardware distributor is not responsible for the communication system installation, but the hardware specification should reference the requirement and the contractor should verify coordination between trades.

NFPA 101 Selected Reentry: When It Is Used and What It Requires

Selected reentry is a NFPA 101 option that allows some stair-side doors to be mechanically locked (not capable of unlocking remotely or automatically) while others remain unlocked or electronically unlockable. It provides a security benefit for floors that handle highly sensitive operations, but the IBC does not permit it. Selected reentry is only a valid specification in jurisdictions where NFPA 101 is the adopted code and the IBC is not.

NFPA 101 Selected Reentry Rules

At least two stair-side doors in the stairwell must allow reentry (be unlocked or electronically unlockable)
No more than four locked floors between floors that allow reentry
The top floor or next-to-top floor in the stairwell must allow reentry with access to another exit
Signage on stair-side doors that allow reentry must identify those doors as reentry points
Signage on stair-side doors that do not allow reentry must identify the nearest reentry floor in both the up and down directions

In practice, selected reentry is rarely used and is not available under the IBC. The NFPA 101 compliance requirement that the AHJ confirm selected reentry applicability means that specifiers who consider it must obtain explicit AHJ approval before specifying mechanically-locked floors in a stairwell that would not comply with full simultaneous-unlock requirements.

Door Hardware for Other High-Rise Building Door Types

Door Location	Fire Rating	Key Hardware Requirements	SecurityParts.com Products
Stairwell enclosure doors (2-hour construction)	90-minute	Self-closing, positive latching, fire exit hardware or lever; reentry hardware on stair side	Von Duprin 98/99 with electrified trim
Stairwell enclosure doors (1-hour construction)	60-minute	Self-closing, positive latching; fire exit hardware where assembly occupancy thresholds apply	Von Duprin 33A Series fire-rated exit device parts
Horizontal exit fire doors	90-minute (in 2-hour barrier)	Self-closing, positive latching, swing in direction of egress; pairs swing opposite directions	LCN 4040XP door closer parts
Floor corridor doors (tenant entry)	Per AHJ	Access control integration; electrified lockset or electric strike on non-fire-rated tenant doors	Electric strike parts for tenant corridor access
Lobby and podium exit doors	None (exterior)	Panic hardware if assembly occupancy threshold exceeded; access control on entry side	Von Duprin exit device parts for lobby egress
Mechanical/electrical room doors	45 to 90-minute (hazardous area)	Self-closing, positive latching; restricted access with cylindrical or mortise lock	Schlage ND Series cylindrical lock parts

For parts and specification support on any of these door types, contact SecurityParts.com at 845-935-0301 or the contact page.

Why Choose Security Parts for High-Rise Door Hardware Parts

Fail-safe electric strike prohibition mechanism documented, 2024 IBC three-trigger change, Cook County fire history, communication system requirement, and same-day OEM shipping.

Strike Prohibition Mechanism

We document the specific mechanical reason fail-safe electric strikes are prohibited on fire-rated stairwell doors: keeper retraction removes positive latching, allowing fire pressure to exploit the unretained latch bolt. No competitor explains the mechanism at the parts level.

2024 IBC Three-Trigger Change

We document the 2024 IBC change that added fire alarm activation and power failure as required unlock triggers in addition to the fire command center, making fail-safe hardware mandatory under the 2024 edition rather than best practice.

Communication System Coordination

We document the every-fifth-floor two-way communication requirement as a separate requirement from the unlocking hardware, requiring Division 27/28 coordination that is often missed in door hardware specifications.

Same-Day OEM Shipping

Von Duprin electrified trim, Schlage fail-safe lockset parts, and LCN closer parts ship same day from US warehouses. Call 845-935-0301 or the contact page for stairwell hardware support.

What Makes Security Parts Different for High-Rise Hardware Parts

We document the Cook County Administration Building fire of 2003 as the specific historical event that killed six people in a stairwell with mechanically-locked stair-side doors, explaining why the stairwell reentry requirements are not bureaucratic code complexity but a response to documented preventable deaths.
We document the fail-safe electric strike prohibition with the specific mechanical explanation: the keeper retraction removes positive latching, and the code requires unlocking without unlatching precisely because fire pressure can push open a door whose latch bolt is not mechanically engaged in a strike.
We document the IBC vs NFPA 101 selected reentry difference: NFPA 101 allows selected reentry with spacing and signage rules; the IBC does not allow selected reentry at all. Specifiers who apply NFPA 101 selected reentry rules on an IBC-jurisdiction project create non-compliant hardware.
We document the 2024 IBC three-trigger change that added fire alarm activation and power failure as mandatory unlock triggers, closing the gap between older IBC editions and NFPA 101 and making fail-safe hardware specification mandatory rather than voluntary under the 2024 edition.
We carry Von Duprin electrified exit device trim for stairwell reentry, Schlage fail-safe cylindrical lock parts, and LCN door closer parts for all high-rise hardware applications as authorized Allegion OEM parts.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About High-Rise Building Door Hardware

What is stairwell reentry and why is it required in high-rise buildings?

Stairwell reentry allows building occupants inside a stairwell to open the stair-side door and reenter the building floor when the stairwell becomes smoke-filled. High-rise stairwells are commonly locked on the stair side to prevent unauthorized tenant floor access during normal operations. If those locks cannot be remotely released during a fire, occupants who enter the stairwell can become trapped. The Cook County Administration Building fire in Chicago in 2003 killed six people in this exact scenario. Both the IBC and NFPA 101 now require stair-side doors to allow remote unlocking or automatic unlocking under fire conditions.

Why can't a fail-safe electric strike be used for stairwell reentry on a fire door?

A fail-safe electric strike retracts the strike keeper when unlocking, removing the mechanical engagement between the latch bolt and the strike. The code requires stairwell doors to unlock without unlatching: the latch bolt must remain extended and engaged even while the stair-side lever is unlocked. A fail-safe electric strike violates this by eliminating positive latching, allowing fire pressure to push the door open against the unretained latch bolt. The correct hardware is fail-safe electrified lever trim (Von Duprin) or a fail-safe lockset, which unlocks the lever while leaving the latch bolt mechanically engaged in the strike.

What is the difference between IBC and NFPA 101 stairwell reentry requirements?

Three key differences: release trigger (IBC pre-2024 required fire command center signal; NFPA 101 requires fire alarm activation; 2024 IBC now requires both plus power failure), selected reentry (NFPA 101 allows some floors mechanically locked with spacing and signage rules; IBC does not allow selected reentry), and mechanical locking on 4 stories or fewer (NFPA 101 permits this; IBC does not in recent editions). Verifying which code your jurisdiction has adopted before specifying stairwell hardware is essential because applying NFPA 101 rules on an IBC-jurisdiction project creates non-compliant hardware.

What is the every-fifth-floor two-way communication requirement in high-rise buildings?

The IBC requires a telephone or two-way communication device at every fifth floor of the stairwell in high-rise buildings with electrically-locked stair doors, connected to a constantly attended location. This allows occupants trapped in the stairwell to call for help if the remote unlocking has not yet been activated. It is a separate requirement from the unlocking hardware, requiring coordination between Division 8 (hardware) and Division 27 or 28 (communications) during construction. Many stairwell hardware specifications address the unlocking requirement but miss the communication system requirement.

What are the three 2024 IBC trigger conditions for unlocking stairwell doors?

The 2024 IBC expanded from one trigger to three, any of which must independently cause simultaneous unlocking of all electrically-locked stairwell doors: a signal from the fire command center or by emergency personnel from the main entrance (the only trigger in prior editions); activation of a fire alarm signal in an area served by the stairwell (new in 2024; aligns IBC with NFPA 101); and power failure to the electric lock or locking system (new in 2024; codifies what was already industry standard practice of specifying fail-safe hardware). Under the 2024 IBC, fail-safe hardware specification is no longer voluntary: it is required by the power-failure trigger.

What exit device hardware is used for stairwell reentry on fire-rated doors?

The two compliant hardware approaches are fail-safe electrified lever trim for fire exit hardware, and fail-safe locksets. Von Duprin electrified trim on 98/99 Series or 33A Series exit devices provides a stair-side lever that is electrically held locked during normal operation and unlocks on fail-safe signal or power failure, while the exit device latch bolt remains extended and positively engaged in the strike throughout. For stair doors with cylindrical locksets rather than exit devices, a fail-safe lockset unlocks the lever electrically while maintaining latch engagement. Fail-safe electric strikes cannot be used on fire-rated stairwell doors.

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Schlage B663 Classroom Deadbolt: Parts Guide, ANSI Function, Cylinder Options, and B663 vs B563 Comparison Thursday, August 6, 2026

The Schlage B663 classroom deadbolt is a Grade 1 B-Series deadbolt designed specifically for classroom and institutional applications where outside entry must be key-controlled while inside egress remains accessible at all times. If you are looking for B663 replacement parts, trying to understand the difference between the B663 and B563, or deciding between the B663P, B763P, and B863P cylinder options, this guide covers all of it.

All B663 replacement parts are available at SecurityParts.com through the Schlage B-Series parts catalog. Browse the complete Schlage commercial hardware parts catalog for the full range of B-Series components.

What Is the Schlage B663 Classroom Deadbolt

The Schlage B663 is a classroom deadbolt in the B600 series. Its ANSI function designation is E0171 (or E0172 for the double-cylinder variant). In plain language: a key from outside throws or retracts the deadbolt. The inside thumbturn retracts the bolt only, it cannot throw the deadbolt from inside. When the deadbolt is fully thrown, it automatically deadlocks, meaning the bolt cannot be pushed back without the key or the inside thumbturn.

This function is why the B663 is the standard specification for classrooms, healthcare exam rooms, and institutional spaces where an authorized person with a key controls outside entry, but anyone inside can exit freely at any time by turning the thumbturn. It is not a lockout deadbolt in the sense of trapping people inside, inside egress is always free through the thumbturn.

The B663 belongs to the B600 series, which is the heavy-duty Grade 1 tier within the Schlage B-Series deadbolt family. For context on how the B600 series fits within the full Schlage B-Series deadbolt lineup, see the Schlage B-Series deadbolt parts guide at SecurityParts.com.

ANSI Function E0171: What It Means in the Field

Every Schlage B-Series deadbolt carries an ANSI function code that precisely describes how the lock operates. The B663 carries ANSI function E0171. Understanding this code prevents specification errors when replacing or ordering locks.

ANSI E0171 Behavior

Outside: Key retracts or throws the deadbolt. Key is required for outside entry, the outside rose is a fixed trim, not a handle
Inside: Thumbturn retracts the bolt only. Inside occupants can always exit freely
Deadlocking: When the deadbolt is fully thrown, it automatically deadlocks. The bolt cannot be pushed back with a credit card or shimmed. The key or thumbturn is required to retract it
Emergency access: The outside cylinder provides the only outside entry. An emergency release key (not included with the lock, ordered separately) can be used by authorized personnel if needed

ANSI E0172: The Double-Cylinder Variant

The B663 is also available in ANSI function E0172, which replaces the inside thumbturn with a second key cylinder on the inside. This configuration is used in applications where inside egress must also be key-controlled. E0172 installations require careful compliance review, as NFPA 101 and many local building codes restrict or prohibit double-cylinder deadbolts on egress doors. Confirm local code requirements before specifying E0172 on any door in an egress path. For fire door hardware compliance context, see the commercial door fire rating guide.

For most classroom applications, E0171 (single cylinder outside, thumbturn inside) is the correct and code-compliant specification. For a broader reference on ANSI/BHMA hardware grading and function codes, see the ANSI/BHMA door hardware standards guide.

Schlage B663 vs B563: What Is the Difference

The B563 and B663 both carry classroom deadbolt function (E0171/E0172) and look nearly identical from the outside. They are different generations of the same function and share some but not all replacement parts. Understanding the difference prevents ordering the wrong components.

Schlage B302-045 Rose and Turn, Classroom, used in the B563 (500-series) classroom deadbolt. The B663 (600-series) uses a different rose and turn assembly (12-618). These two components are not interchangeable. Both B563 and B663 parts are available through the Schlage B-Series parts catalog at SecurityParts.com.

B563: 500-Series Classroom Deadbolt

The B563 is the 500-series version of the classroom deadbolt. It uses an older rose and turn assembly (part B302-045) and an older-style cylinder housing (part B302-043). The B563 cylinder housing is a conventional design. The B563 cylinder options are: 22-003 for conventional 6-pin, with IC cylinder options available separately. The outside rose and trim ring design differs from the B663.

B663: 600-Series Classroom Deadbolt

The B663 is the current 600-series classroom deadbolt. It uses the 12-618 rose and turn classroom assembly, a different and updated cylinder housing (B610-025), and a different deadbolt assembly (12-631). The B663's bolt uses a 1-inch throw with a sintered steel construction and concealed hardened anti-saw pin insert. The trim, cylinder housing, and deadbolt components from the B563 and B663 are not interchangeable.

Practical Identification

When identifying which series is installed, the fastest method is reading the model designation stamped on the lock. On the B663, look for "B663P" (conventional), "B763P" (Primus), or "B863P" (Primus High Security) on the cylinder or on the lock label inside the door. The B563 is marked "B563P," "B763P," or "B863P" in its own format. The mounting hole pattern also differs, the B600 series uses a different door preparation than the B500 series in some configurations.

For a detailed parts diagram and labeled component breakdown of Schlage deadbolt series, see the Schlage deadbolt diagram guide.

Schlage B663 Cylinder Options: B663P, B763P, and B863P

The B663 classroom deadbolt is available with three cylinder security levels. The cylinder security level determines how resistant the lock is to picking, bumping, and key duplication, not how the lock functions. All three variants operate identically in the field (ANSI function E0171). Only the cylinder changes.

B663P: Conventional 6-Pin Cylinder

The standard B663. Cylinder part number 22-644. Uses a conventional 6-pin cylinder with the Schlage keyway. Available for master keying, construction keying, and standard key-alike or key-different configurations. Appropriate for most commercial and institutional applications where the Schlage key system is already in use. This is the most commonly specified B663 variant.

B763P: Primus Cylinder

The B663 with a Primus cylinder (part number 20-744). The Primus cylinder adds a secondary locking bar in the cylinder body that provides additional resistance to picking and cylinder manipulation. Key control is restricted, Primus keys cannot be duplicated at standard hardware stores and require authorization through the Schlage Primus key control system. Specified for higher-security institutional environments where key control is a documented requirement.

B863P: Primus XP High Security Cylinder

The B663 with a Primus High Security cylinder (part number 20-544). This is the highest security cylinder option in the B663 family. The Primus XP cylinder is ANSI/BHMA Grade 1 certified with additional security attributes beyond the standard Primus. Key control is strictly restricted. Specified for government facilities, financial institutions, and high-security educational environments where the most stringent key control is required.

FSIC and SFIC Options

The B663 is also available with FSIC (Full Size Interchangeable Core) and SFIC (Small Format Interchangeable Core) cylinder formats for facilities using interchangeable core key systems. These allow the cylinder to be rekeyed or swapped without special tools or disassembly of the lock body. FSIC cylinders fit in the same housing as the conventional B663P cylinder. SFIC requires a different door preparation and has specific door thickness requirements (1-3/8 to 2 inches versus 1-5/8 to 2-1/2 for conventional). For guidance on Schlage key systems including Primus, IC, and master keying, see the Schlage key systems guide.

Schlage B663 Physical Specifications

The following specifications apply to the standard B663 classroom deadbolt as confirmed from the B-Series product catalog available at SecurityParts.com.

ANSI Function: E0171 (single cylinder outside, thumbturn inside) or E0172 (double cylinder)
ANSI/BHMA Grade: Grade 1 (A156.29 certified)
Deadbolt throw: 1 inch
Deadbolt material: Solid sintered steel with concealed hardened anti-saw pin insert
Backset: Adjustable 2-3/8 inch or 2-3/4 inch (60 mm or 70 mm); fixed backset options available
Door thickness (conventional cylinder): 1-5/8 inch to 2-1/2 inch (41 mm to 64 mm)
Door thickness (SFIC cylinder): 1-3/8 inch to 2 inch (35 mm to 51 mm)
Faceplate: 1-1/8 inch x 2-1/4 inch, square corner standard; circular drive-in option available
Strike: 1-1/8 inch x 2-3/4 inch square corner standard; options available
Dust box: Metal with three 3-inch screws (included)
Handing: Non-handed
Cylinder housing: Solid zinc, outside; part B610-025
Thumbturn and rose: Pressure cast zinc, plated or powder coated to match finish
Cylinder format: Conventional 6-pin (B663P), FSIC, SFIC, Primus (B763P), Primus XP High Security (B863P)
Key system: Everest 29 S123 keyway (standard); open and restricted keyway families available
Finishes available: 605, 606, 609, 612, 613, 619, 622, 625, 626, 626AM (antimicrobial), 643e

For finish code cross-reference and matching guidance across Schlage hardware, see the commercial door hardware finish guide.

Schlage B663 Parts: What Each Component Does

The B663 classroom deadbolt is serviced through the B-Series parts catalog. All replacement parts are accessible through the Schlage B-Series parts page at SecurityParts.com. Part numbers listed below are from the official B663/763/863 parts list. Where a dedicated product page exists on SecurityParts.com, the link is provided. Where no dedicated page exists, the part number is provided as plain text for reference when ordering through the B-Series catalog or by calling 845-935-0301.

Primary Operating Components

Rose and Turn Classroom Assembly (12-618): The outside rose and turn assembly unique to the B663/763/863. This is the escutcheon plate visible on the outside of the door with the key cylinder mounted through it. The rose and turn is the primary outside trim component. Part 12-618 is specific to the B663 series and is not interchangeable with the B563's B302-043/B302-045 rose assembly.

Deadbolt with Screws (12-631): The 1-inch sintered steel deadbolt with concealed hardened anti-saw pin insert. Replaces when the bolt shows wear, corrosion, or damage that affects smooth throw and retraction. The B663 deadbolt (12-631) is not the same part as the B560/B563 deadbolt.

Cylinder Housing Outside (B610-025): The outside cylinder housing that holds the cylinder in the door preparation. Replaces when the housing is damaged or when the cylinder retaining mechanism fails.

Cylinder Retainer Screw (B520-298): The screw that secures the cylinder in the housing. Frequently lost during cylinder replacement. Always have spares on hand when servicing B663 cylinders in quantity.

Cylinder Options

The B663 uses three cylinder part numbers depending on the security level ordered:

22-644: Standard 6-pin conventional cylinder for the B663P
20-744: Primus 6-pin cylinder for the B763P
20-544: Primus XP High Security 6-pin cylinder for the B863P

When replacing a cylinder, always confirm the existing cylinder format (conventional, Primus, Primus XP, FSIC, or SFIC) before ordering. Swapping cylinder formats may require changes to the cylinder housing and collar components. For cylinder compatibility guidance and Schlage key system support, see the Schlage key systems guide.

Trim and Hardware Components

Strike with Screws (10-094): The standard square corner strike plate included with the B663. Installs in the door frame and receives the thrown deadbolt.

Dust Box, Metal (10-112): The metal dust box that mounts in the frame behind the strike. Included with the B663. Anchored with three 3-inch screws for security reinforcement at the frame.

Trim Ring with Shield (B520-649): The trim ring that mounts around the outside cylinder housing. Provides a finished appearance and conceals the door preparation edges around the cylinder.

Schlage B520-649 Trim Ring with Shield. An outside trim component of the Schlage B663 classroom deadbolt that mounts around the cylinder housing, concealing the door preparation edges and providing a finished appearance. In stock at SecurityParts.com.

Trim Ring 1/8 inch (36-066): Spacer trim ring for indicator function only. Used when the B663 is ordered with the occupancy indicator option.

Security Insert 1/8 inch (36-068): Security spacer for indicator function only. Used with indicator configurations on the 2-1/8 inch bore option.

Security Shield (B600-017): The security shield used with the 2-1/8 inch door prep option. Reinforces the door face around the cylinder bore.

Mounting Plate for Rose and Turn (B600-018): The mounting plate that supports the rose and turn assembly. Provides the structural connection between the outside trim and the door.

Spin Ring (B600-070): The anti-friction spin ring that allows the trim ring to rotate freely without binding against the door surface during operation.

UL Fire Cup (B520-657): The fire cup included when the B663 is ordered with fire rating. Installs inside the cylinder bore to provide the UL fire listing for the assembly. This component is not sold separately, it is only available with the fire-rated lock as ordered. Replacement of the fire cup alone does not restore a UL fire listing if the original was damaged or removed. For fire door hardware guidance, see the commercial door fire rating guide.

Fasteners

B600-066: 6-32 x 1/4-inch mounting screw (also available in screw pack B610-250)

B600-100: 1/4-28 x 1-15/16-inch mounting screw (also available in screw pack B610-250)

C603-897: 8 x 3/4-inch deadbolt and strike screw

R525-256: 3-inch metal dust box screws

B520-298: Cylinder retainer screw

All screw packs and individual fasteners for the B663 are available through the Schlage B-Series parts catalog at SecurityParts.com.

Schlage B600-018 Mounting Plate for Rose and Turn. Provides the structural connection between the B663 outside trim assembly and the door. Available through the Schlage B-Series parts catalog at SecurityParts.com.

The Indicator Function Option on the Schlage B663

The B663 is available with an occupancy indicator option that shows the room status through a small window in the outside rose. When the deadbolt is thrown (room occupied and locked), the indicator window shows red or a visible signal. When the deadbolt is retracted, the window shows clear or green.

This option is commonly specified for single-occupancy restrooms, private offices, and healthcare exam rooms where a visual signal prevents interruptions. The indicator function requires the 2-1/8-inch door bore (wider than the standard B663 bore) and uses additional trim parts including the 36-066 trim ring, 36-068 security insert, and indicator-specific screws.

The indicator trim (part 47722496), indicator fire cup (part 47807069 for fire-rated applications), and fire cup disk (part 47779637) are designated in the official B663 parts manual but are not sold separately. If the indicator components need replacement on a fire-rated B663 indicator installation, contact SecurityParts.com at 845-935-0301 for current availability before ordering.

Schlage B663 Fire Rating

The B663 classroom deadbolt is available in a fire-rated configuration. The fire-rated version includes the UL fire cup (B520-657) installed in the cylinder bore during the original manufacturing. The UL fire cup is what gives the assembled lock its fire rating listing, it is not an add-on to a standard B663.

There are two critical field implications of this:

First, if you are replacing a fire-rated B663 with a standard non-fire-rated unit, the replacement must also be fire-rated for the assembly to remain compliant. A standard B663 cylinder installed in a fire-rated door opening where a fire-rated B663 was previously specified does not maintain the opening's UL fire listing.

Second, the UL fire cup is not sold separately. If an existing fire-rated B663 has been serviced and the fire cup was lost or damaged, the lock assembly itself must be replaced with a new fire-rated unit to restore the listing. This is not a parts repair situation, it requires a new fire-rated lock.

Always confirm the fire rating status of the existing installation before ordering a B663 replacement. For a complete guide to fire-rated commercial door hardware requirements, see the commercial door fire rating guide. For the case for OEM replacement parts on fire-rated assemblies, see the OEM vs aftermarket commercial door hardware guide.

Ordering Schlage B663 Replacement Parts Without a Return

Five pieces of information prevent the most common ordering errors on B663 parts.

Schlage 10-094 Flat Square Corner Strike with Metal Box. The standard strike included with the Schlage B663 classroom deadbolt. OEM replacement available through the B-Series parts catalog at SecurityParts.com.

1. Confirm the Series: B563 or B663

Read the model designation on the lock before ordering any operational components. B563 (500-series) and B663 (600-series) use different rose and turn assemblies, cylinder housings, and deadbolts. The parts are not interchangeable.

2. Confirm the Cylinder Format

Conventional (B663P), Primus (B763P), Primus XP (B863P), FSIC, or SFIC. Ordering the wrong cylinder format results in a cylinder that does not fit the housing or is incompatible with the existing key system.

3. Confirm the Door Bore

Standard B663 parts fit the standard bore. If the lock was ordered with the indicator function, the door has the wider 2-1/8-inch bore and uses indicator-specific trim components. Standard trim parts do not fit the indicator bore correctly.

4. Confirm the Fire Rating Status

Fire-rated and non-fire-rated B663 units are not interchangeable. The fire cup is integral to the fire-rated unit. Confirm whether the existing installation is fire-rated before ordering any replacement lock or cylinder.

5. Confirm the Backset

The B663 adjusts between 2-3/8 inch and 2-3/4 inch backset, but fixed backset options exist. Confirm the current backset before ordering a replacement deadbolt or housing, as some fixed-backset variants use different components than the standard adjustable unit.

Call 845-935-0301 before ordering if any of these details are unclear. SecurityParts.com pre-order support can confirm the correct B663 parts for your specific installation before the order ships.

Where to Find Schlage B663 Parts at SecurityParts.com

All B663 replacement parts are accessible through the Schlage B-Series parts catalog at SecurityParts.com. The B-Series catalog organizes components by part type, deadbolt parts, cylinder components, trim assembly parts, strikes, and fasteners, and is the correct starting point for identifying any B663 service component.

For the broader Schlage deadbolt parts reference including component diagrams and labeled illustrations, see the deadbolt parts guide and the Schlage deadbolt diagram. For cylindrical lock parts context and how deadbolts fit within the broader Schlage commercial hardware lineup, see the cylindrical lock parts guide.

Browse the complete commercial cylindrical locks and deadbolt parts catalog and the full commercial door hardware parts catalog at SecurityParts.com. For parts identification and pre-order support, call 845-935-0301 or visit the contact page.

Why Choose SecurityParts.com for Schlage B663 Parts

SecurityParts.com has supplied OEM Schlage commercial hardware parts since 2001. Every B663 replacement component is genuine Schlage OEM, not aftermarket or rebranded substitutes.

Schlage B-Series commercial deadbolt parts at SecurityParts.com. OEM replacement components for the full B-Series lineup including B663, B563, B660, B662, and B664 models. Same-day shipping on stocked parts from US warehouses.

OEM Parts Only

Non-OEM deadbolt components on a fire-rated B663 installation can void the UL fire listing. OEM replacement parts maintain Grade 1 certification and ensure the lock assembly performs to the original specification.

Pre-Order Configuration Support

Identifying whether a lock is B563 or B663, or confirming the cylinder format before ordering, prevents the most common B663 parts return situations. SecurityParts.com provides pre-order support by phone at 845-935-0301 for exactly these situations.

Same-Day Shipping on Stocked Parts

Stocked B-Series components ship same day from US warehouses. For facility maintenance and repair situations where a classroom or institutional door is out of service, same-day dispatch minimizes the downtime window.

Browse all Schlage B-Series parts including B663 classroom deadbolt components at SecurityParts.com. For the complete Schlage hardware range including B-Series, L-Series, ND Series, and ALX Series, browse the Schlage commercial hardware catalog.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Schlage, Von Duprin, LCN, Falcon, and Detex parts since 2001. Technical information in this guide is sourced from the Schlage B-Series Service Manual, the Schlage B600/700/800 Series Cut Sheet, and the Schlage B-Series Commercial Grade Deadbolts Catalog. For Schlage B663 parts identification and same-day shipping availability, call 845-935-0301 or visit SecurityParts.com.

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How to Specify Commercial Door Hardware: Division 8 Section 08710, Hardware Schedules and the Submittal Process Wednesday, August 5, 2026

Commercial door hardware is specified in CSI MasterFormat Division 8 (Openings), specifically Section 08 71 00 (formerly Section 08710). Hardware is organized into numbered hardware groups (or sets) that list every component for each door type: hinges, lockset, closer, stop, seals, thresholds, and specialty items. The door schedule on the architectural drawings assigns each door to a hardware group. The keying schedule (developed separately at a keying conference) defines the master key hierarchy for every lockable door. The hardware submittal is prepared by the hardware distributor, reviewed by the architect or AHC, and returns as Approved, Approved as Noted, Revise and Resubmit, or Rejected. Substitutions go through Division 01 Section 01 25 13 procedures with the CSI Substitution Request Form. Errors between the door schedule and hardware specification are the most common source of change orders on commercial hardware projects.

The Division 8 specification process is where security intentions become actual hardware on actual doors. An architect's vision for building security is only as good as the hardware specification that translates it into purchase orders. A facility manager who inherits a building without understanding how the hardware was specified cannot effectively plan for maintenance, replacement, or upgrades. And a contractor who doesn't understand the submittal process will generate avoidable change orders, delays, and rework. This guide covers every layer of the process from specification structure through delivery.

For parts, replacement components, and OEM hardware for Division 8 specified products, browse SecurityParts.com: Schlage ND Series cylindrical lock parts, Schlage L Series mortise lock parts, Von Duprin exit device parts, LCN door closer parts, and the complete Allegion hardware and parts catalog.

How CSI Division 8 Is Organized

The Construction Specifications Institute (CSI) MasterFormat divides a project's construction specifications into divisions by trade and product category. Division 8, titled Openings, covers everything related to building openings: doors, frames, windows, curtain walls, hardware, and glazing. Each product category within Division 8 has its own section number, and every section follows the same three-part structure (General, Products, Execution) that contractors, distributors, and architects have used for decades.

Section	Title	Relevance to Hardware
08 11 00	Metal Doors and Frames	Defines hollow metal door and frame specifications; hardware prep requirements for frames
08 14 00	Wood Doors	Covers architectural flush wood doors; hardware blocking and factory prep requirements
08 41 00	Entrances and Storefronts	Aluminum entrance systems; hardware integration with storefront framing
08 71 00	Door Hardware	Primary hardware specification section: hinges, locks, closers, exits, seals, all finish hardware
08 80 00	Glazing	Glass types and performance for vision panels and glazed openings
08 31 00	Access Doors and Panels	Mechanical, electrical, plumbing access doors; typically separate from finish hardware

The old numbering system (08710, 08711, etc.) and the current six-digit numbering (08 71 00) refer to the same content. Older project manuals and many institutional owner standards still use the old format. Both formats follow identical organization; only the section numbering differs.

Section 08 71 00 Structure: What the Three Parts Cover

Part 1: General

Part 1 covers the administrative and procedural requirements for the hardware specification. Key elements include: the AHC qualification requirement (many specifications require the hardware supplier to employ a current Architectural Hardware Consultant available during the project); submittal requirements and format; delivery, storage, and protection requirements; coordination requirements with other divisions; and the keying conference requirement. Part 1 also sets out source limitations: most institutional specifications require that each type of hardware (all locksets, all closers, all exit devices) come from a single manufacturer, not mixed brands within a hardware group.

Part 2: Products

Part 2 defines the specific hardware products: manufacturers, product series, material standards (ANSI/BHMA grades), finishes, and function codes. This is where hardware groups are defined. Each group lists every component with its manufacturer's catalog number, ANSI/BHMA grade, finish (in ANSI/BHMA finish code format), and any special requirements (fire rating, electrification, cylinder type).

Part 3: Execution

Part 3 covers installation: mounting heights for each hardware type, adjustment requirements, field verification, and closeout requirements including delivery of keys to the owner and submission of as-built hardware schedules.

Hardware Groups: How Door Hardware Is Organized in the Specification

The hardware group (also called a hardware set) is the core organizational unit of Section 08 71 00. It is a numbered list of every hardware item required for a specific door type. Groups are numbered sequentially; all doors assigned to the same group receive identical hardware.

HW-3 Example Hardware Group: Interior Office Door, 36x84, Hollow Metal, Non-Fire-Rated

Quantity / Item

Specification

Finish

3 Hinges

Schlage (Allegion) 4-1/2 x 4-1/2, heavy weight, antifriction bearing, NRP

US26D (652)

1 Cylindrical Lock

Schlage ND53PD RHO, ANSI F04 (office function), 2-3/4" backset, conventional C keyway

US26D (626)

1 Door Closer

LCN 4040XP, size 3, regular arm, powder coat

689 (aluminum)

1 Wall Stop

Trimco 1270CW, solid rubber bumper, 2-inch diameter

US26D

3 Silencers

Trimco 1229A, gray rubber, frame-mounted (hollow metal frame)

N/A

How Hardware Groups Are Assigned

The AHC or hardware consultant assigns hardware groups based on each door's function, location, fire rating, occupancy requirements, security level, and expected traffic volume. Two doors that appear identical on the floor plan may use different hardware groups if one is on a fire-rated wall and the other is not, or if one requires an electrified lockset for access control integration.

Grouping logic typically follows this pattern: doors with the same function, same fire rating, same finish, and same security level share a hardware group. Changes in any of those variables create a new group. On a large project with 300 doors, there may be 20 to 40 hardware groups covering all door types.

The hardware group assignment error that generates the most change orders on commercial projects: Fire-rated and non-fire-rated versions of an otherwise identical door are frequently assigned the same hardware group in error. A 90-minute fire door requires NRP (non-removable pin) hinges, a mortise lock with 3/4-inch throw, a door closer, and smoke gasketing. A non-fire-rated interior door with the same size, material, and function does not require most of those components. When fire-rated and non-fire-rated doors are accidentally assigned to the same hardware group, either the non-fire doors receive unnecessary expensive hardware, or the fire doors receive insufficient hardware that fails inspection. Reviewing every hardware group assignment against the fire rating column in the door schedule before submitting is the single most valuable pre-submittal check.

The Door Schedule: Bridge Between Drawings and Specification

The door schedule is a tabular document on the architectural drawings (typically on the finish schedule or door/window schedule sheet) that lists every opening on the project with its complete identifying information. Each row is one opening. The columns typically include: door number, floor level, opening size (width and height), door material and gauge, frame material and profile, fire rating, hardware group designation, glazing requirements, and special notes.

Reading a door schedule entry works like this: Door 201 / Floor 2 / 3'-0" x 7'-0" / HM 18 gauge / HM KD frame / 90-minute / HW-7 / None / Pair, closer on pull side. The hardware distributor reads door 201 as a 90-minute pair, orders the hardware specified in Group HW-7, and confirms that the fire-rated group includes pair-compatible hardware (coordinator, active leaf flush bolts if specified, or constant-latching flush bolts per NFPA 80 healthcare requirements).

On large projects, door schedules contain hundreds or thousands of rows. Conflicts between the door schedule and the hardware specification are among the most common sources of project delays and change orders. The most frequent conflicts: a door schedule assigns a fire-rated door to a non-fire-rated hardware group; a door schedule shows a pair but the hardware group specifies single-door hardware; or a door schedule shows an electrified opening but the hardware group has no power transfer provision.

The Keying Schedule and the Keying Conference

The keying schedule is a separate document from the hardware specification and the door schedule, but it must be coordinated with both. It defines the complete master key hierarchy for the project and assigns every lockable door to a specific change key, master key group, and level of the keying system.

The keying conference is a meeting between the hardware distributor, the building owner (or owner's representative), and often a locksmith or security consultant. It typically occurs during the submittal phase after the hardware submittal is approved. The keying conference produces three outcomes: the agreed master key hierarchy (levels, groups, and the organizational logic behind them); the keyed-alike and keyed-different assignments for every door; and the key quantity required for each level.

What the Keying Schedule Must Include

A complete keying schedule lists each door number, the lock function at that opening, the change key designation, which master key(s) open it, and any special keying requirements (keyed alike with another opening, cross-keyed, or master keyed only). For projects using SFIC (Small Format Interchangeable Core) cylinders, the keying schedule also identifies the control key hierarchy and the core changeover plan from construction keys to permanent keys.

Most specifications require the hardware distributor to submit the keying schedule for architect and owner approval before ordering cylinders. Cylinders cut to an incorrect keying arrangement cannot be corrected without replacing the cylinder or repinning. Keying errors discovered after installation are expensive corrections.

Browse Schlage ND Series cylinders and key system components and Schlage Everest 29 restricted keyway products at Security Parts.

The Hardware Submittal Process

Hardware distributor prepares submittal package

The distributor compiles a complete submittal: every hardware item organized by group, with manufacturer, model number, catalog reference, finish, function code, and ANSI/BHMA grade. Product data sheets for each item. Grade certifications. Finish samples if required by the specification. A marked-up copy of the hardware schedule showing any proposed substitutions clearly noted as such. The keying schedule if ready. Point-to-point wiring diagrams for electrified hardware.

General contractor reviews and stamps

The GC reviews the submittal for completeness and stamps it with their subcontractor coordination review before forwarding to the architect. GC review is an administrative check, not a technical hardware review. The GC's stamp confirms the submittal has been reviewed by the contractor, not that the hardware is correct.

Architect or AHC reviews for specification conformance

The architect (or the AHC acting as the architect's agent) reviews each item against the specification requirements. Grade, function, finish, and any special requirements are checked against Part 2 of the hardware specification. Any substitutions are checked against the substitution request format and evaluated for equality. Comments and status are marked on each item.

Submittal returns with review status on each item

The reviewed submittal returns to the distributor via the GC. Each item carries one of four review statuses. Items marked Revise and Resubmit or Rejected must be corrected and resubmitted before materials can be ordered. Items marked Approved or Approved as Noted can proceed to order.

The Four Submittal Review Statuses

Approved

Supply exactly as submitted. No changes required. The specified product was submitted and confirmed.

Approved as Noted

Supply with the noted corrections. Corrections are minor (finish code revision, function number typo, quantity adjustment). No resubmittal required unless the notes include significant changes.

Revise and Resubmit

Does not meet specification requirements as submitted. Submit a corrected alternative for review. Common for: wrong ANSI grade, wrong finish, wrong function, or substitution without a formal substitution request.

Rejected

Does not comply and a substitution is not acceptable. Provide the specified product. Used when a substitution request was submitted and denied, or when the submitted product is fundamentally non-compliant.

Hardware Substitutions: Division 01 Section 01 25 13

A substitution is a request to provide a product different from what was specified by the architect. The substitution procedure is not in Section 08 71 00. It is defined in Division 01 of the project manual, typically Section 01 25 13 (Product Substitution Procedures). Submitting a proposed alternative as if it were the specified product, without a formal substitution request, will generate a Revise and Resubmit status at minimum and a Rejected status if the reviewer recognizes the product does not match.

What a Valid Substitution Request Requires

The CSI Substitution Request Form is the standard vehicle. A complete substitution request includes: the specified product (manufacturer, model, specification reference); the proposed substitute (manufacturer, model, catalog reference); a point-by-point comparison demonstrating that the substitute meets the same performance grade, function, application, aesthetic, and quality as the specified product; documentation of any differences and why they do not affect performance; and the reason the specified product cannot be provided (typically discontinued, long lead time, or pricing).

The "or equal" problem that generates the most substitution rejections: Many specifications state that the specified product "or equal" will be accepted. Contractors and distributors frequently assume that any product meeting the ANSI/BHMA minimum grade qualifies as an equal. It does not. The architect specifies products for reasons beyond the minimum standard: specific mechanisms, warranties, mounting compatibility, finish range, cycle testing beyond Grade 1, or manufacturer-specific features that competitors do not share. An ANSI/BHMA A156.2 Grade 1 cylindrical lockset from Manufacturer A may not be an equal to a Grade 1 lockset from Manufacturer B even though both meet Grade 1 minimums, because Grade 1 is the floor, not the ceiling. Substitution requests that rely solely on grade certification without a point-by-point comparison of features beyond the minimum are regularly rejected.

Fire-Rated Opening Coordination in Section 08 71 00

Fire-rated openings are the most regulated and highest-risk element of a hardware specification. Every component on a fire-rated opening must be part of a tested and listed assembly, and the authority having jurisdiction (AHJ) can require replacement of any component that does not match the listing, even if the substitution appears functionally identical.

Fire Rating	Typical Application	Hardware Requirements
20 min	Corridor walls, tenant separation, some interior walls	Self-latching, UL listed hardware; closers not always required
45 min	3/4-hour openings in 1-hour separations; stairwells in some occupancies	Self-closing and self-latching; listed hinges; listed closer
60 min	Horizontal exits, 1-hour occupancy separations	Self-closing, self-latching, positive latch; all hardware UL listed for 1-hour
90 min	Stairwell enclosures in 2-hour construction, exit enclosures	Self-closing, self-latching, positive latch; all hardware UL listed for 90 min; no glazing limitations for some assemblies
180 min	Fire walls, building separations	Most restrictive hardware requirements; limited trim options; all hardware must match listed assembly

The Change Order Risks That Fire-Rated Openings Create

Hardware group assigned to wrong fire rating

The most common specification error: a 90-minute fire door is assigned to hardware group HW-3, which was written for non-fire-rated interior doors. The group does not include a door closer, NRP hinges, or smoke gasketing. Caught during submittal review, it adds two to three weeks for revision and resubmission. Caught in the field during installation inspection, it adds three to six weeks for correction and replacement hardware sourcing.

Non-listed hardware substituted on fire-rated opening

A hardware distributor substitutes a cylindrical lockset from a manufacturer not listed for that specific fire door assembly, or a closer from a manufacturer whose listing does not cover the door width. The AHJ inspects and requires replacement with listed hardware. Replacement cost: full hardware package for the affected doors plus installation labor.

Pairs of fire doors without proper coordinators or flush bolts

Pairs of fire doors require coordinators (to ensure the inactive leaf closes before the active leaf) and constant-latching flush bolts on the inactive leaf. Hardware groups that specify single-door hardware for a pair opening, or that omit the coordinator when one is required by the fire door listing, generate field corrections and reinspections.

Door closer specification not matching fire rating requirement

A door closer specified for a fire-rated opening must carry UL 10C Positive Pressure listing. A closer that is ANSI/BHMA Grade 1 but lacks UL 10C cannot be used on a fire-labeled door assembly regardless of its mechanical performance rating. Hardware groups that specify a closer by grade only without confirming UL 10C listing create field corrections.

For OEM replacement parts for all fire-rated hardware categories, browse LCN door closer parts with UL 10C listing, Von Duprin fire-rated exit device parts, and Schlage L Series mortise lock parts for fire door applications at Security Parts.

What the AHC Designation Means and When It Matters

The Architectural Hardware Consultant (AHC) designation is awarded by the Door and Hardware Institute (DHI) and has existed since 1940. It certifies that the holder has demonstrated mastery in commercial door hardware product application, code integration (fire, life safety, ADA accessibility), and professional specification writing. The AHC exam tests knowledge across all hardware categories, all relevant codes (IBC, NFPA 80, NFPA 101, ADA, ANSI/BHMA standards), and the specification and submittal processes described in this guide.

Many Division 8 specifications include a qualification requirement stating that the hardware distributor must employ or have available an AHC during the project. This means the distributor submitting the hardware bid and preparing the hardware submittal must have a current AHC on staff or retained. When a contractor receives a specification with this requirement, they should verify AHC status with the hardware distributor before awarding the hardware subcontract. A hardware submittal prepared without AHC involvement on a project that requires it may be returned for resubmission at the contractor's expense.

Contact SecurityParts.com for parts support, specification assistance, and OEM hardware for Division 8 projects. Reach the SecurityParts.com team at 845-935-0301 or the contact page.

Why Choose Security Parts for Division 8 Project Parts

Fire-rated group assignment error documentation, or-equal substitution rejection mechanism explained, keying conference deliverables, AHC qualification requirement, and same-day OEM shipping.

Fire Group Assignment Error

We document that assigning fire-rated and non-fire-rated doors to the same hardware group is the single most common hardware specification error, and the specific change order cost it generates at each stage when discovered (submittal vs field inspection). No competitor documents this at the parts level.

Or-Equal Substitution Reality

We document why Grade 1 certification alone does not make a product an approved equal when the specification product exceeds minimum standards. This is the most common substitution rejection reason and is not explained in competitor content.

Keying Conference Deliverables

We document the three specific deliverables the keying conference must produce: the agreed master key hierarchy, the keyed-alike/keyed-different assignments, and the key quantities. Missing any deliverable creates keying errors discovered after installation.

Same-Day OEM Shipping

OEM parts from Schlage, Von Duprin, LCN, and Falcon ship same day for all Division 8 specified products. Call 845-935-0301 or the contact page for specification support.

What Makes Security Parts Different for Division 8 Project Hardware Parts

We document the specific change order cost timeline for the most common hardware specification error (fire-rated vs non-fire-rated doors in the same hardware group) at two stages: caught during submittal review (two to three weeks for revision) and caught in the field during inspection (three to six weeks). Giving contractors the cost of catching it late creates urgency to verify before submitting.
We document why "or equal" does not mean "meets Grade 1 minimum" on projects where the specified product exceeds the minimum standard. The architect's product choice often encodes requirements beyond the minimum that a CSI substitution request must demonstrate, not just assert.
We document the three specific keying conference deliverables that must be completed before cylinders can be ordered, and what happens to project schedule when the keying conference is delayed because the building owner has not made access control decisions.
We document the UL 10C Positive Pressure listing requirement for door closers on fire-rated assemblies as distinct from ANSI/BHMA Grade 1 mechanical certification. A Grade 1 closer without UL 10C fails fire-rated opening requirements. This distinction is missed in most competitor hardware content.
We carry Schlage ND Series cylindrical lock parts, Schlage L Series mortise lock parts, Von Duprin exit device parts, and LCN door closer parts for all Division 8 hardware categories as authorized Allegion OEM parts.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Division 8 Door Hardware Specification

What is CSI Division 8 and what does Section 08 71 00 cover?

CSI MasterFormat Division 8 (Openings) covers all door, frame, hardware, glazing, and related components in commercial construction. Section 08 71 00 (Door Hardware, formerly 08710) is the specific section specifying all finish hardware: hinges, locksets, exit devices, door closers, stops, seals, and specialty items. It is organized in three parts: General (qualifications, submittals, delivery), Products (specifications and hardware groups), and Execution (installation, adjustment, closeout). It forms the contractual basis for all hardware on the project.

What is a hardware group (hardware set) in a door specification?

A hardware group is a numbered list of every hardware component required for a specific door type. Groups are numbered sequentially (HW-1, HW-2, etc.) and include every item: hinges, lockset, closer, stop, seals, threshold, silencer, and specialty items. Every door on the project is assigned to a hardware group in the door schedule; all doors with the same group number receive identical hardware. The group is the specification's complete answer to: what hardware does this door get?

What is the difference between the door schedule and the hardware specification?

The door schedule is a tabular drawing document listing every door with its size, material, fire rating, and assigned hardware group number. The hardware specification (Section 08 71 00) in the project manual defines what is in each group. They work together: the door schedule tells you which group each door uses; the specification tells you what that group contains. Conflicts between the two documents are the most common source of hardware project change orders. The fire rating column in the door schedule vs the fire-rated requirements in the hardware group is the most frequent conflict point.

How does the hardware submittal process work?

The hardware distributor prepares a submittal package listing every hardware item by group with manufacturer, model, finish, function, and any substitutions. The general contractor reviews and stamps it, then forwards it to the architect. The architect or AHC reviews each item against the specification and returns it marked Approved, Approved as Noted, Revise and Resubmit, or Rejected. Items marked Revise and Resubmit or Rejected must be corrected and resubmitted. Materials can only be ordered after items are Approved or Approved as Noted.

What is the substitution procedure for door hardware and how is it handled?

Substitutions go through Division 01 Section 01 25 13 (Product Substitution Procedures), not Section 08 71 00. A valid substitution request uses the CSI Substitution Request Form with a point-by-point comparison showing the substitute meets the same grade, function, aesthetic, and quality as the specified product. The architect judges whether a substitution is an approved equal. Meeting ANSI/BHMA minimum Grade 1 is not sufficient if the specified product exceeds the minimum standard in ways the substitution does not match.

What is an Architectural Hardware Consultant (AHC) and when is one required?

The AHC is a professional certified by the Door and Hardware Institute (DHI) since 1940 in commercial hardware specification, code compliance, and project coordination. The AHC validates mastery in product application, fire/life safety/ADA code integration, and specification writing. Many Division 8 specifications require the hardware supplier to employ a current AHC during the project and that the hardware schedule be prepared under AHC supervision. Contractors should verify AHC status with their hardware distributor before award on any project that includes this requirement.

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K-12 School Door Hardware Guide: Classroom Security Locks, Lockdown Requirements and Barricade Device Violations Tuesday, August 4, 2026

The 2018 IBC, IFC, and NFPA 101 require classroom doors to be lockable from inside without opening the door, always unlockable from outside by key or approved credential, and free for egress at all times via a single operation with no key or tool required. The Schlage ND78 (ANSI F110, 180-degree lockdown) is the recommended classroom security lock for new projects, replacing the older ND75 (360-degree). Classroom door barricade devices violate ADA accessibility requirements and IBC egress codes because floor-anchored devices prevent wheelchair and mobility-impaired egress, and most require more than one operation or special technique to release. SFIC interchangeable cores reduce teacher transition rekeying from 30 minutes per cylinder to approximately 15 seconds, eliminating locksmith service calls. Assembly spaces with more than 49 occupants (gyms, cafeterias, auditoriums) require Von Duprin exit devices on all egress doors.

School door hardware sits at the intersection of active shooter response, fire egress code, ADA accessibility, and operational realities that no other building type faces at the same time. A product that solves the lockdown requirement but violates ADA is not a solution. A product that satisfies egress code but requires 30 locksmith visits per year to maintain is not viable. Getting every layer right from day one means the school is protected, code-compliant, and manageable for the facilities team actually running the building.

Browse school security hardware at SecurityParts.com: Schlage ND78 and ND Series classroom security lock parts, Von Duprin 98/99 Series exit device parts for school gymnasiums, Von Duprin exit alarm parts for monitored secondary exits, electric strike parts for school vestibule access control, and the complete Allegion school security hardware catalog.

180 deg ND78 lockdown key rotation (counterclockwise + return to home). ND75 required a full 360-degree rotation.

15 sec Approximate time to rekey a classroom cylinder with SFIC vs 30 minutes with a conventional cylinder and locksmith

49+ Occupant load threshold requiring panic hardware on assembly occupancy egress doors (gyms, cafeterias, auditoriums)

34-48 in Required height range for all egress door hardware under IBC and ADA. Floor-anchored barricades violate this by definition.

The Historical Context: Why School Egress Codes Exist

The fire at Our Lady of the Angels parish school in Chicago in 1958 killed 92 children and 3 nuns. It remains one of the most devastating school fires in American history, and it fundamentally changed how NFPA approached school egress requirements. In the aftermath, NFPA completely rewrote its provisions for schools, revising exit standards with such thoroughness that since 1958 there has not been a single US school fire with more than ten deaths.

This history matters when evaluating classroom door security products because every code requirement for school egress, including the single-operation release requirement and hardware height limits that make barricade devices non-compliant, exists because a previous generation of inadequate egress hardware contributed to preventable deaths. The same codes now governing classroom lockdown hardware reflect decades of evidence about what happens when egress is compromised. The answer to an active shooter threat cannot be hardware that would have prevented children from escaping a fire in 1958.

What IBC, IFC, and NFPA 101 Actually Require for Classroom Doors

The 2018 editions of the International Building Code (IBC), International Fire Code (IFC), and NFPA 101 Life Safety Code established a three-part requirement for classroom security that resolves the competing demands of active shooter lockdown and fire egress compliance. All three requirements must be satisfied simultaneously.

ANSI/BHMA A156.30 defines the specific lockdown functions that satisfy the model codes at the product level. Schlage ANSI Function F110 (used in the ND78 and ND75) is the cylindrical lock function that satisfies all three simultaneously. The outside lever locks on key turn; the key provides outside access for authorized staff; the inside lever remains free at all times for occupant egress.

The code complexity that creates compliance problems in school districts: The model codes (IBC, IFC, NFPA 101) are adopted at the state level, and states frequently adopt earlier editions or add amendments. A school district operating in a state with the 2015 IBC adopted may face different specific requirements than a district in a state with the 2021 edition. Beyond the model codes, many states have enacted independent classroom security legislation that may be stricter than the model code requirements. Before specifying classroom security hardware for any school project, confirm the specific adopted edition and any state supplements with the authority having jurisdiction (AHJ). The national model code minimum is the floor, not the ceiling.

Schlage ND78 vs ND75: Why the 180-Degree Lockdown Is the Correct Specification

OLDER FUNCTION

Schlage ND75 (ANSI F110)

Lockdown operation: Full 360-degree key rotation required to initiate lockdown. Key must complete one full revolution and return to home position for key removal.

Unlock operation: Full 360-degree reverse rotation to unlock.

Practical effect: Full rotation takes more time under stress, particularly for teachers whose fine motor skills are degraded by an adrenaline response during an active threat event. Requires the teacher to maintain grip and complete the full arc.

When to use: Existing school systems already on ND75 where consistency with the current master key system requires matching functions. Do not specify on new projects.

Existing systems only

CURRENT RECOMMENDATION

Schlage ND78 (ANSI F110)

Lockdown operation: 180-degree counterclockwise rotation and return to home position. Half the rotation of the ND75.

Unlock operation: 180-degree clockwise rotation and return to home position.

Instruction rose: In 626 finish, ships with instruction rose (part 47342586) showing key rotation direction on the escutcheon itself. Teachers who have never practiced the lockdown can operate the lock correctly in an emergency by reading the rose.

Compatibility: Available in conventional, FSIC, and SFIC cylinder formats. Same price and lead time as ND75. Direct replacement for ND75 in hardware schedules.

ND98 variant: ND98 adds Vandlgard reinforcement for installations requiring resistance against lever torque attacks exceeding the standard ND78 specification.

The ND78 operational advantage that no competitor documents at the parts level: The 180-degree vs 360-degree difference is not just about speed. Under acute stress, humans experience fine motor skill degradation: hands shake, grip strength is inconsistent, and the ability to complete smooth rotational movements decreases. A teacher attempting to lock a classroom door during an active threat event is under extreme stress. The 180-degree ND78 operation requires half the rotation arc, reduces the time the teacher's attention is on the lock rather than on the door and its window, and is completed in a shorter hand movement that is more achievable under degraded motor control. The instruction rose on the 626 finish ND78 further reduces cognitive load by showing the operation directly on the hardware. These are the operational reasons Allegion recommends the ND78 for all new projects, and they are not documented at the parts ordering level by any competitor.

Why Classroom Door Barricade Devices Violate Building Codes

Classroom door barricade devices are secondary hardware products (floor anchors, door bars, portable brackets, over-closer devices) intended to reinforce classroom doors against forced entry. They are sold as a quick, low-cost security upgrade and are bought by well-intentioned school administrators facing genuine security concerns. They also violate multiple concurrent code requirements, and no variance or exception makes them legal in a means of egress.

ADA accessibility violation: hardware height requirement

IBC and ADA Standards require all egress door hardware to be mounted between 34 and 48 inches above the finished floor. Floor-anchored barricade devices are mounted at or near floor level, below the 34-inch minimum, making them inaccessible to wheelchair users, people using walkers or canes, small children, and anyone who cannot bend to floor level under stress. A person in a wheelchair cannot engage or disengage a floor-anchored device. In an emergency requiring egress, this is potentially fatal. This is the ADA discrimination liability that school districts assume when installing floor-anchored barricade devices.

IBC single-operation egress release violation

IBC Section 1010.1.9 requires that all latches on a means of egress door be releasable by a single releasing operation from the egress side, without requiring special knowledge or effort. Most barricade devices require the occupant to know the device exists, locate it in a dark or smoke-filled room, and perform a separate operation (lift, slide, or remove) before the door can open. This is explicitly prohibited by the single-operation requirement. The inside lever release of the classroom lock must be the only operation required for egress.

First responder access denial

IBC and the 2018 model codes require that classroom doors be unlockable from outside by a key or other means approved by the code official. Barricade devices that physically prevent the door from opening cannot be released from outside with a key. Law enforcement and emergency medical personnel responding to a school emergency cannot access a classroom secured with an interior barricade device, even with master keys. This is not a theoretical concern: it is the specific scenario that the outside-key-access requirement was written to address.

Door closer and exit device modification prohibition

Devices that wrap around or attach to door closer arms or exit device push bars to create additional leverage points violate the prohibition against modifying listed hardware. A door closer arm is a fire-listed component of the door assembly; attaching an unlisted secondary device to it voids the listing and creates a potential fire code deficiency. Many over-closer barricade devices marketed to schools fall into this category.

The political pressure that keeps non-compliant barricade devices in schools despite code violations: After high-profile school shooting events, school boards face intense community pressure to do something immediately. Barricade devices are cheap, can be installed overnight, and are visually reassuring in a way that a re-spec'd cylindrical lock function is not. Some fire marshals have issued variances under political pressure, which does not make the devices code-compliant; it creates a documented liability if the device contributes to an egress incident. When school administrators ask about barricade devices, the professional obligation is to explain that the 2018 IBC, IFC, and NFPA 101 already require the functionality the barricade is trying to provide, through the inside-lockable classroom lock requirement, and that the ND78 classroom lock satisfies the security requirement without the code violation.

SFIC Rekeying for K-12 Schools: The Teacher Turnover Advantage

K-12 schools have classroom credential change needs that most building types never face. Teachers leave mid-year, long-term substitutes cycle through multiple classrooms, keys are lost, and security incidents occasionally require isolating a specific classroom's key access from the rest of the school system without waiting for a scheduled locksmith visit.

Factor	Conventional Cylinder	SFIC Interchangeable Core
Rekeying time per cylinder	25 to 30 minutes (remove, repin, reinstall)	10 to 15 seconds (control key swap)
Locksmith required	Yes, for most schools	No; facilities staff can rekey
Door open required	Yes, to remove cylinder	No
Cost per rekey event	Service call + labor + parts	Cost of replacement core only
Master key system impact	No change to master key hierarchy	No change to master key hierarchy
Speed of security response	Hours to next available locksmith	Immediate, same day, any time
Upfront cost	Lower per lock	Higher per lock (core cost)
Campus with 40 classrooms, 20% annual turnover	8 locksmith calls/year minimum	8 core swaps, no service calls

Browse Schlage ND Series SFIC and conventional classroom cylinder parts at Security Parts.

School Security Vestibule Design: Hardware for a Working Mantrap

The security vestibule (mantrap) at a school's main entrance is the first line of active defense against unauthorized entry. It creates a controlled transition zone where visitors are visually verified by staff before gaining access to the main building. Getting the hardware right on both vestibule doors is what separates a functional security layer from a vestibule that staff prop open because the hardware is frustrating to operate.

Exterior vestibule door: controlled entry

Visitors approach and press an intercom or call button. Staff releases the exterior door remotely via an electrified strike or magnetic lock from the school office. The visitor enters the vestibule. The exterior door locks behind them immediately or on a timed delay.

Vestibule: identity verification

The visitor is held in the vestibule, visible through a vision panel or camera to the office. Staff verifies identity and purpose. The interior door remains locked. If identity is rejected, the visitor can exit through the exterior door (which must allow free egress at all times).

Interior vestibule door: controlled access to school

After identity verification, staff releases the interior door via an electrified strike or magnetic lock. The visitor enters the school, where they typically check in at the office window immediately adjacent to the vestibule exit.

Hardware Requirements for Each Vestibule Door

Both vestibule doors must provide free egress from inside in compliance with IBC means of egress requirements. Magnetic locks (fail-safe: unlock on power loss) satisfy this requirement because the push-side occupant can always exit by pushing the door open when power fails. Electric strikes used on vestibule doors must also be fail-safe (unlocking on power loss) to ensure egress during a power outage or fire alarm panel activation. ADA-accessible vestibule entries require power operators that open both vestibule doors automatically for visitors requiring accessible entry. Browse electric strike parts for school vestibule control doors at Security Parts.

Exit Devices for School Assembly Spaces

When Panic Hardware Is Required

NFPA 101 and the IBC require panic hardware (exit devices) on egress doors from assembly occupancies with an occupant load exceeding 49 persons. A school gymnasium, cafeteria, auditorium, and theater all regularly exceed this threshold and require Von Duprin or equivalent exit devices on every egress door serving those spaces. Standard classroom cylindrical locks are not permitted on assembly occupancy egress doors above the 49-person occupant load threshold.

Von Duprin 98/99 Series for School Applications

The Von Duprin 98/99 Series is the standard specification for school assembly space exit hardware due to its abuse resistance, wide range of fire-rated configurations, and alarm integration options. For gymnasium and cafeteria secondary exit doors that open to athletic fields or service areas, the exit alarm (EA) version adds an audible alarm on exit to deter unauthorized use while maintaining compliant panic egress. The exit alarm sounds immediately when the push bar is pressed, without a delay, alerting staff to unauthorized door use without preventing emergency egress.

Browse Von Duprin 98/99 Series exit device parts and Von Duprin exit alarm parts at Security Parts.

School Key System Design: Restricted Keyways and Construction Keying

Restricted Keyways for School Security

Schools are a primary target for key duplication abuse. Students, former employees, and unauthorized persons regularly attempt to duplicate keys to gain unauthorized access. Specifying a restricted keyway (Schlage Everest 29 R or FSIC/SFIC with restricted keyways) prevents unauthorized key duplication at standard key cutting machines because the restricted key blank is not commercially available and cutting requires factory authorization. For schools with high enrollment and many key holders, restricted keyways provide meaningful administrative security against key duplication.

The Construction Keying Issue Specific to School Projects

School construction projects often run across summer, with substantial completion timed to the start of the academic year. The construction master key system uses a specific bitting range. If the permanent classroom key system is not designed to exclude those construction bitting combinations from the change key assignment range, a newly hired teacher who receives a classroom key may accidentally have a key that also opens the construction core in any lock where installation or replacement occurred over the summer. Verify with your key system specifier that construction key bittings are excluded from the permanent change key range before finalizing the key system for any school project. Browse Schlage Everest 29 restricted keyway cylinders for school key control at Security Parts.

Why Choose Security Parts for School Security Hardware Parts

ND78 vs ND75 180-degree operational advantage documented, barricade device discrimination liability explained, SFIC service call elimination quantified, construction bitting exclusion, and same-day OEM shipping.

ND78 Stress Response Advantage

We document the fine motor skill degradation under stress as the operational reason the ND78's 180-degree rotation is recommended over the ND75's 360-degree rotation, not just the speed difference. This physiological basis for the specification is documented nowhere else at the parts ordering level.

Barricade Device Liability

We document the specific ADA discrimination liability from floor-anchored barricade devices that prevent wheelchair and mobility-impaired egress, beyond just stating they are non-compliant. School districts need to understand the discrimination lawsuit exposure, not just the code citation risk.

SFIC Service Call Elimination

We quantify the SFIC vs conventional cylinder cost difference specifically for school teacher turnover: a 40-classroom school with 20 percent turnover eliminates 8 locksmith service calls per year. No competitor documents this calculation.

Same-Day OEM Shipping

Schlage ND78, Von Duprin 98/99, and school security parts ship same day from US warehouses. Call 845-935-0301 or the contact page for specification support.

What Makes Security Parts Different for K-12 School Hardware Parts

We document the Our Lady of the Angels fire as the historical event that drove NFPA school egress code reform, explaining why the single-operation egress requirement and hardware height limits that make barricade devices non-compliant exist. The history shows these are not bureaucratic red tape but earned lessons from preventable deaths.
We document the fine motor skill degradation under acute stress as the physiological basis for why the ND78's 180-degree operation is genuinely better than the ND75's 360-degree operation in a real active threat event. Competitors state the degree difference but do not explain why it matters in the moment of use.
We document the ADA discrimination lawsuit exposure from floor-anchored barricade devices that prevent wheelchair and mobility-impaired egress, specifically framed as a civil rights liability rather than just a building code citation. School boards respond differently to lawsuit exposure than to code violation notices.
We document the construction keying bitting exclusion specific to school projects, where summer construction timelines create a conflict between construction core bittings and permanent classroom key assignments that is not covered anywhere in competitor content.
We carry Schlage ND78 and ND Series classroom lock parts, Von Duprin 98/99 exit device parts, exit alarm parts, and electric strike parts for complete school security specification in one order.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About K-12 School Door Hardware

What are the IBC and NFPA 101 requirements for classroom door locks in K-12 schools?

The 2018 IBC, IFC, and NFPA 101 require three things simultaneously: the door must be lockable from inside the classroom without opening it; it must always be unlockable from outside by a key or code-official-approved credential; and egress must remain free from inside at all times via a single releasing operation with no key, tool, or special technique. All egress hardware must be mounted 34 to 48 inches above the finished floor. ANSI/BHMA A156.30 defines the lockdown functions meeting these requirements. Schlage Function F110 (ND78) satisfies all three.

What is the difference between the Schlage ND78 and ND75 classroom security locks?

Both are ANSI F110 classroom security cylindrical locks. The ND75 requires a full 360-degree key rotation to initiate lockdown. The ND78 requires only 180 degrees counterclockwise and return to home. The 180-degree operation is faster, requires less fine motor coordination under stress, and in 626 finish the ND78 ships with an instruction rose showing key rotation direction on the escutcheon itself. Allegion recommends the ND78 for all new projects; the ND75 remains available for existing system consistency. Both share the same price and lead time.

Why do classroom door barricade devices violate building codes?

Classroom barricade devices violate multiple codes simultaneously. Floor-anchored devices are below the 34-inch ADA minimum hardware height and cannot be operated by wheelchair users or mobility-impaired individuals, creating ADA discrimination liability. IBC requires all egress door latches to be releasable by a single operation from inside without special knowledge; barricade devices require additional separate operations. First responders cannot enter a classroom secured with a physical barricade using master keys, violating the outside-key-access requirement. Many states have specifically banned these devices. The code-compliant alternative is the ND78 classroom security lock, which provides inside lockdown without these violations.

What exit devices are required in K-12 school gymnasiums and auditoriums?

Assembly occupancies with an occupant load exceeding 49 persons require panic hardware (exit devices) on all egress doors under NFPA 101 and IBC. School gymnasiums, cafeterias, and auditoriums typically exceed this threshold. Von Duprin 98/99 Series is the standard specification for school assembly exit hardware. Secondary exits to athletic areas should use the exit alarm (EA) version to deter unauthorized use while maintaining compliant panic egress. Trim on outside should be cylinder dogging or less dogging to prevent mechanical dogging on fire-rated exits.

How does SFIC rekeying help K-12 schools with teacher turnover?

Conventional cylinders require 25 to 30 minutes and a locksmith to rekey. SFIC interchangeable cores rekey in approximately 10 to 15 seconds using a control key, with no locksmith required and no need to open the door. A 40-classroom school with 20 percent annual teacher turnover eliminates approximately 8 locksmith service calls per year with SFIC, replacing them with core swaps performed immediately by facilities staff. SFIC also allows same-day response to key loss or security incidents rather than waiting for available locksmith scheduling.

What is a school security vestibule and what hardware does it require?

A security vestibule creates a two-door controlled transition zone at the main entrance where visitors are visually verified by office staff before gaining building access. The exterior door uses a fail-safe electrified strike or magnetic lock released from the school office. The interior door uses the same, released only after identity verification. Both doors must provide free egress from inside (fail-safe hardware unlocks on power loss). ADA entries require power operators. Exit devices are required if the vestibule doors serve as egress from assembly occupancies. Browse Security Parts for electric strike and exit device parts for vestibule applications.

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Von Duprin 880NL Trim Guide: Functions, Cylinder Selection, Compatibility, and Ordering for the 88 Series Tuesday, August 4, 2026

If you have a Von Duprin 88 Series exit device and need to add or replace the outside trim, the 880 series is the correct trim family for that device. The Von Duprin 880NL trim is the night latch configuration within that family, and it is the most commonly specified option when the application requires key-controlled entry on an 88 Series rim or mortise device.

This guide covers every 880 series outside trim function, how each one works, which configuration to order for rim versus mortise devices, finish selection, cylinder compatibility, compatible 88 Series devices, and where to source OEM parts. Browse the Von Duprin 880NL Pull Trim at SecurityParts.com, or view the complete Von Duprin 88 Rim Series parts catalog.

What Is the Von Duprin 880NL Trim

The Von Duprin 880NL is an outside pull trim with night latch function, designed specifically for the Von Duprin 88 Series heavy-duty rim and mortise exit devices. "Outside trim" refers to the hardware visible and operable from the non-secured side of the door, typically the corridor or exterior side, while the exit device push bar handles egress from the inside.

The NL designation stands for night latch. In ANSI terminology, the 880NL carries ANSI Function 03, which means a key retracts the latchbolt from outside. When the key is turned, the outside lever or pull is released and the latch retracts, allowing entry. Without a key, the pull grip is fixed and the door cannot be opened from outside. Inside egress is always free through the push bar.

The escutcheon plate is manufactured from 10-gauge (2.4mm) brass, bronze, or stainless steel. The plate measures 3 inches wide by 14-1/16 inches tall with a 2-inch projection. It is non-handed, meaning a single unit works on both left-hand and right-hand door installations without modification. ANSI/BHMA A156.3 (2001) Grade 1 certification applies.

Von Duprin 880NL Pull Trim with Night Latch Function. ANSI/BHMA Grade 1, 10-gauge escutcheon, non-handed. Available in R (rim) and M (mortise) configurations at SecurityParts.com.

Von Duprin 880NL Trim: R vs M Configuration

When ordering this trim, the single most important selection is the configuration suffix: R or M. This determines which cylinder type the trim accepts, and ordering the wrong configuration is the most common mistake when replacing 880 trim.

880NL-R: Rim Device Configuration

The 880NL-R accepts a rim cylinder. Rim cylinders mount through the door and engage the rim device's cylinder cam on the inside. They are used with the standard 88 Series rim exit device in its standard configuration. The rim cylinder is ordered separately and not included with the 880NL-R trim.

Use 880NL-R when: the device is an 88, 88-F, 8827, or 8827-F rim exit device in standard rim configuration.

880NL-M: Mortise Device Configuration

The 880NL-M accepts a 1-1/4-inch mortise cylinder. Mortise cylinders are taller than rim cylinders and engage a mortise cylinder cam in devices configured with a mortise lock chassis. The mortise cylinder is ordered separately and not included with the 880NL-M trim.

Use 880NL-M when: the device is an 8847-F, 8875, or 8875-F device using a mortise lock configuration, or when a standard 88 device has been ordered with a mortise device option.

To confirm which cylinder type your installation requires, look at the device configuration code on the exit device label. The trim model will also match what was originally specified, if the original trim shows 880NL-R, the replacement is also 880NL-R. If unsure, call 845-935-0301. SecurityParts.com pre-order support can confirm the correct configuration before the order ships.

All Von Duprin 880 Series Outside Trim Functions

The 880 series covers five outside trim functions for the Von Duprin 88 Series exit device. Understanding the difference between them is essential when specifying new trim or replacing a worn unit, because each function controls entry from outside in a different way. All five share the same 3" x 14-1/16" escutcheon plate and 2" projection.

880NL: Night Latch Function

ANSI Function 03. A key retracts the latchbolt from outside. The pull grip is fixed unless the correct key is used. Standard outside access control for offices, schools, and institutional buildings where after-hours key security is required. This is the most widely specified function in the 880 series. The 880NL is in stock at SecurityParts.com.

880DT: Dummy Trim Function

The 880DT is a dummy trim with a pull grip that operates freely, it does not require a key and does not control a latch. It is used when the exit device is in the dogged (latched back) position for extended periods, such as during business hours on a high-traffic entrance, and outside entry occurs by pushing the door. The 880DT is also used on the inactive leaf of a pair of doors when no outside access control is needed. Browse the 880DT Pull Trim at SecurityParts.com.

Important: The 880DT is not recommended for use on fire-rated devices. On fire-rated 88-F, 8827-F, 8847-F, or 8875-F devices, the device cannot be dogged, making the dummy function impractical and potentially non-compliant.

880TP: Thumbpiece Trim, Classroom Function

ANSI Function 12. A thumbpiece on the outside trim controls the latch. Pressing the thumbpiece retracts the latch and allows entry. A key can lock or unlock the thumbpiece independently of the latch. This is the classroom function, turning the key in one direction locks the thumbpiece (outside cannot enter), turning it the other direction unlocks (outside can enter by pressing thumbpiece). Used in schools, healthcare exam rooms, and applications requiring toggle-lock outside access.

880K: Knob Trim, Classroom Function

ANSI Function 12. Same classroom function as the 880TP but with a knob instead of a thumbpiece. A key locks and unlocks the knob independently. When locked, turning the knob has no effect. When unlocked, turning the knob retracts the latch. The 880K is specified when the architectural requirement calls for a knob rather than a thumbpiece, or when ADA lever requirements do not apply to the specific opening.

880EO: Exit Only Trim

The 880EO provides no outside trim control of the latch. There is no cylinder, no thumbpiece, and no knob. The pull grip is decorative only. Entry from outside is not possible with the 880EO installed. This function is used on stairwell re-entry doors, loading dock exits, and other locations where the door must allow egress but should not permit re-entry from outside under normal conditions. The 880EO is also the correct trim choice for most fire-rated 88-F devices where no outside entry is required.

Compatible Von Duprin 88 Series Devices

The 880 series outside trim is designed for and compatible with the following Von Duprin 88 Series exit device models. Always verify the device model before ordering trim, because the Von Duprin 88 Series includes both rim and mortise configurations, and the trim suffix (R vs M) must match the device configuration.

88 and 88-F

The standard 88 Series heavy-duty rim exit device. The non-fire-rated 88 supports all five 880 trim functions. The fire-rated 88-F supports 880EO, 880NL, 880TP, and 880K but not 880DT, since dogging is prohibited on fire devices. Both use the 880NL-R (rim cylinder configuration).

8827 and 8827-F

The 8827 is the 88 Series device with a pullman latch at the top and bottom for double-door applications without a center mullion. The non-fire-rated 8827 supports all five 880 functions. The fire-rated 8827-F supports EO, NL, TP, and K but not DT. The NL function on 8827 and 8827-F is available using this trim or by using a 370 series trim set for NL function during installation, or a TP-NL or K-NL designation.

8847-F

A fire-rated CVR (concealed vertical rod) device in the 88 series. The 8847-F uses a mortise cylinder configuration. Order the 880NL-M (mortise cylinder configuration) when specifying NL trim on an 8847-F device.

8875 and 8875-F

The 8875 is the 88 Series device with a mortise lock chassis. The mortise lock provides positive latching through a mortise bolt in addition to the CVR rods. Both the 8875 and fire-rated 8875-F use the 880NL-M (mortise cylinder) configuration. On the E8875 (electrified version), key override is an NL type function.

For the complete 88 Series device and trim compatibility reference, see the Von Duprin 88 Series catalog and the Von Duprin 88 Series buyer's guide at SecurityParts.com.

880NL Trim Dimensions and Specifications

The physical specifications are consistent across all 880 pull trim configurations (880NL, 880DT) that use the standard escutcheon plate. Understanding these dimensions is important for confirming compatibility with an existing door preparation before ordering.

Escutcheon plate width: 3 inches
Escutcheon plate height: 14-1/16 inches (14.0625 inches)
Projection from door face: 2 inches (51mm)
Gauge: 10 gauge (2.4mm) steel
Materials: Brass, Bronze, or Stainless Steel (finish-dependent)
Handing: Non-handed
ANSI Function: 03 (key retracts latchbolt)
Standard: ANSI/BHMA A156.3 (2001) Grade 1

The 880K knob trim uses a wider projection (2-3/4 inches) due to the knob body. All other 880 trim configurations share the 2-inch projection of the 880NL.

Finish Options for Von Duprin 880NL Trim

All 880 series trim configurations are available in multiple finishes. Finish selection must match the exit device body and other hardware on the opening. Ordering a finish that does not match the existing hardware creates a visible mismatch and may not comply with specification requirements on public buildings.

Von Duprin finish codes follow the ANSI/BHMA US designation system. Common finishes for this trim include:

US3 / 605: Bright brass
US10B / 613: Dark oxidized bronze, oil rubbed
US26 / 625: Bright chromium plated
US26D / 626: Satin chromium plated (most common specification)
US28 / 628: Satin aluminum, clear anodized
US32 / 629: Bright stainless steel
US32D / 630: Satin stainless steel

Finish must be specified at the time of order. This is a finished item and cannot be re-finished in the field. For guidance on matching finishes across a multi-product hardware specification, see the commercial door hardware finish guide at SecurityParts.com.

Cylinder Selection for 880NL Trim

This trim does not include a cylinder. The cylinder must be ordered separately and must match the trim configuration (rim or mortise) and the key system in use at the facility.

Rim Cylinder for 880NL-R

A rim cylinder for the 880NL-R is a standard format with a cam on the back that engages the device's cylinder cam follower. The cylinder must be pinned to the correct keyway for the facility's master key system. When ordering a rim cylinder for an 880NL-R installation, provide the keyway, any master key requirements, and the number of keys required.

Mortise Cylinder for 880NL-M

A 1-1/4-inch mortise cylinder is required for the 880NL-M. Mortise cylinders are threaded and secured with a setscrew through the cylinder collar. Von Duprin part numbers 961267 (880-M Cylinder Collar) and 965226 (880-R Cylinder Collar) are the cylinder collar components specific to the 880 series when replacing collar hardware. The mortise cylinder must also be pinned to the facility's keyway and key system.

Key System Considerations

If the facility uses a master key system, the cylinder must be pinned to the same keyway and master key level as the other cylinders in the building. Using a different keyway breaks the key hierarchy and creates a door that cannot be opened with the facility master key in an emergency. Confirm the existing keyway before ordering any cylinder for this installation.

How to Identify Your Current 880 Trim Model

When a 880 series trim has worn or been damaged and needs replacement, the fastest identification method is reading the model number stamped on the trim body or escutcheon. On most 880 trim units, the model number appears on the back of the escutcheon plate or on a label affixed to the trim body.

If the label is unreadable, identify the model by checking these characteristics:

Pull grip with keyway: Night latch (NL) or dummy with cylinder preparation
Pull grip without any cylinder hole: Exit only (EO) or dummy without cylinder (DT)
Thumbpiece above or alongside grip: Thumbpiece function (TP)
Knob alongside grip: Knob function (K)
Cylinder type at the door: Rim cylinder = R suffix; 1-1/4" mortise cylinder = M suffix

Once the model is identified, cross-reference against the device model label on the exit device body to confirm compatibility. For the full 88 Series parts and diagram reference, see the Von Duprin 88 Rim Series model page at SecurityParts.com.

Von Duprin 880NL Trim and Fire-Rated Openings

The 880NL is compatible with fire-rated 88 Series devices, including the 88-F, 8827-F, 8847-F, and 8875-F. When installed on a fire-rated device, the following rules apply under NFPA 80:

The exit device must positively latch on every door close. The night latch function on this trim means the outside pull is controlled by key, this does not affect fire rating compliance, as the inside push bar always allows free egress regardless of the outside trim function.

The 880DT dummy trim is not recommended on fire-rated devices because it is designed for use with a dogged (held-open) device, which is prohibited on fire-rated hardware under NFPA 80 Section 4.7.1. If a pull grip is required on a fire-rated device but no key control is needed, the 880EO (exit only) is the appropriate trim choice.

For the complete guidance on fire-rated commercial door hardware requirements, see the commercial door fire rating guide. For OEM parts guidance specific to fire-rated assemblies, see the OEM vs aftermarket commercial door hardware guide.

880NL Trim Components and Replacement Parts

Beyond the trim assembly itself, several individual components within the 880 series are available as separate replacement parts for field repairs. These are useful when the trim escutcheon or pull grip is intact but a specific hardware component has failed.

972467: 880 Pull Grip. The pull bar that attaches to the 880 series escutcheon. Replaces a bent or damaged pull independently of the full trim assembly.
961267: 880-M Cylinder Collar. Cylinder collar for the mortise cylinder configuration. Replaces a worn or stripped collar on 880NL-M installations.
965226: 880-R Cylinder Collar. Cylinder collar for the rim cylinder configuration. Replaces a worn collar on 880NL-R installations.
959575: 880-M/V Thumbpiece. The thumbpiece component for 880TP trim on M and V configurations.
969353: 880TP Thumbpiece Bracket. The bracket securing the thumbpiece assembly to the escutcheon on 880TP trim.
900531: 880 Screw Package for 2-1/4 inch doors. Hardware pack for trim mounting on thick-door installations.
900533: 880 Screw Package for 1-3/4 inch doors. Standard hardware pack for trim mounting on standard commercial door thickness.
956760: 880 Series Hex Stud. Mounting stud for the 880 series escutcheon assembly.
963579: 880NL/DT mounting screw (12-24 x 3/8 inch UFPHMS).

Browse all Von Duprin 88 Series trim and hardware components at the Von Duprin 88 Series parts page at SecurityParts.com.

How to Order Von Duprin 880NL Trim

Ordering this trim correctly requires confirming four specifications before placing the order. Getting any one of them wrong results in a return and delays a repair or installation.

Step 1: Confirm the Device Model

Read the model number from the exit device label. Confirm it is a compatible 88 Series model: 88, 88-F, 8827, 8827-F, 8847-F, 8875, or 8875-F. The 880 trim series does not fit any other Von Duprin series.

Step 2: Confirm R or M Configuration

Check whether the existing installation uses a rim cylinder or a 1-1/4 inch mortise cylinder. Order 880NL-R for rim cylinder installations. Order 880NL-M for mortise cylinder installations.

Step 3: Select the Finish

Match the finish to the existing device and adjacent hardware. This is a finished item. If the exact finish is unknown, contact SecurityParts.com at 845-935-0301 with the existing finish description or the Von Duprin finish code from the device label.

Step 4: Confirm Cylinder Requirements

The trim ships without a cylinder. If a cylinder is needed, order it separately, specifying the keyway, key system level, and number of keys required.

Browse and order the Von Duprin 880NL Pull Trim at SecurityParts.com. For ordering support or configuration questions, call 845-935-0301 or visit the SecurityParts.com contact page.

Why Choose SecurityParts.com for Von Duprin 880NL Trim

SecurityParts.com has supplied OEM Von Duprin commercial hardware since 2001. The 880 series trim is stocked in multiple configurations with same-day shipping from US warehouses on stocked quantities.

Von Duprin commercial door hardware at SecurityParts.com, OEM replacement parts including 880 series trim, 88 Series device components, and complete exit device assemblies.

OEM Parts Only

Every unit stocked at SecurityParts.com is genuine Von Duprin OEM. Non-OEM trim may not meet the ANSI/BHMA Grade 1 standard, may not carry the correct ANSI Function 03 certification, and can void the UL listing on fire-rated assemblies.

Configuration Support Before You Order

R vs M configuration errors are the most common ordering mistake on 880 trim. SecurityParts.com pre-order support can confirm the correct configuration from your device model before the order ships. Call 845-935-0301.

Same-Day Shipping on Stocked Parts

Stocked units ship same day from US warehouses. For facility repairs and construction punch-list items where a door is out of service, same-day dispatch reduces the window a critical opening is incomplete.

Browse all commercial exit device parts, the complete Von Duprin parts catalog, and the full commercial door hardware parts catalog at SecurityParts.com.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Von Duprin, Schlage, LCN, Falcon, and Detex parts since 2001. Technical information in this guide is sourced from the official Von Duprin 88 Series catalog (document 105966), the Von Duprin 88 Rim Series Exit Devices Parts Manual, and the Von Duprin 8875 Mortise Lock Series Exit Devices Parts Manual. For trim configuration support and same-day shipping availability, call 845-935-0301 or visit SecurityParts.com.

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Commercial Door Hardware for Healthcare Facilities: NFPA 101, Anti-Ligature, Infection Control and CMS Compliance Guide Monday, August 3, 2026

Healthcare facilities operate under NFPA 101 Occupancies 18 (new) and 19 (existing) plus CMS Conditions of Participation for Medicare/Medicaid-certified facilities. Key rules: patient room corridor doors are not required to be fire-rated in fully sprinklered facilities, but must have positive-latching hardware. Roller latches are prohibited by CMS (not just NFPA 101). Both leaves of paired corridor doors require positive-latching hardware. Behavioral health units require anti-ligature hardware: Schlage HSLR (NYS-OMH recommended), SL1/SK1, or equivalent. Antimicrobial finishes (US26D-AM, US32D-AM) reduce bacterial load on high-touch surfaces between cleaning cycles. The HL Series hospital latch paddle enables hands-free staff entry. Smoke compartment cross-corridor doors must be self-closing, latching, and smoke-sealed.

Healthcare door hardware is the most heavily regulated product category in commercial construction. A hospital corridor door that satisfies the architect, the code official, and the general contractor may still be cited by a CMS surveyor for a non-compliant latch, or cited during a Joint Commission visit for a missing smoke seal. The codes, the accrediting bodies, and the operational requirements create layered specifications that differ meaningfully from standard commercial or institutional construction. This guide explains every layer and the specific products from SecurityParts.com that satisfy each requirement.

Browse healthcare-specific hardware at SecurityParts.com: Schlage ND Series and HSLR anti-ligature cylindrical lock parts, Schlage L Series and HL Series mortise lock and hospital latch parts, Von Duprin 94/95 INPACT and antimicrobial exit device parts, LCN 4040XP door closer parts for healthcare corridor doors, and the complete Allegion healthcare hardware catalog.

Prohibited Roller latches on healthcare corridor doors under CMS (even where NFPA 101 permits them in some sprinklered existing facilities)

54% Proportion of hospital inpatient ligature suicide attempts from 2010-2017 that used a door or door hardware as the anchor point

NYS-OMH New York State Office of Mental Health recommends Schlage HSLR crescent trim as the anti-ligature standard

Both leaves Paired corridor doors: NFPA 101 requires BOTH leaves to have positive-latching hardware, not just the active leaf

Why Healthcare Door Hardware Has Different Rules

The defend-in-place model is the foundation that makes healthcare door hardware requirements different from every other occupancy type. In most buildings, the fire response is to evacuate occupants out of the building via stairwells. In a hospital, most patients cannot be evacuated vertically: they are post-surgical, on ventilators, in traction, or otherwise unable to move quickly and safely down multiple flights of stairs.

The healthcare code response to this reality is horizontal evacuation: during a fire, staff closes patient room doors and, if necessary, moves patients horizontally into an adjacent smoke compartment rather than out of the building. This model requires that corridor doors hold closed reliably to contain smoke, that smoke compartment doors self-close and seal against smoke passage, and that all this happens without relying on occupants taking action independently.

Every healthcare door hardware requirement flows from this operational model. The positive latching requirement exists because the door must hold closed when fire pressure pushes against it. The roller latch prohibition exists because roller latches fail under pressure. The smoke seal requirement on smoke barrier doors exists because the adjacent smoke compartment must be genuinely smoke-free for the horizontal evacuation to protect patients.

The Hartford Hospital fire that changed healthcare corridor door requirements: The most consequential historical event in healthcare door hardware regulation was a fire at Hartford Hospital in Connecticut. During the fire, corridor doors with rolling door latches released under fire pressure, making it very difficult to keep the doors closed. The inability to maintain smoke compartmentation contributed directly to deaths in that event. In response to this and similar events, NFPA 101 eliminated roller latches from healthcare corridor doors in almost all cases. CMS adopted this requirement absolutely, with no exceptions for sprinklered buildings that NFPA 101 allows in existing occupancies. Understanding that the roller latch prohibition is a direct response to documented patient deaths explains why CMS enforces it without exception.

Healthcare Corridor Door Requirements by Door Type

Patient Room Patient Room Corridor Doors (Non-Fire-Rated)

What the codes require

Positive-latching hardware: latch bolt that mechanically engages the strike on closure. No roller latches.
Smoke resistance: door and frame must be constructed to resist passage of smoke. Not required to achieve a rated level of smoke resistance, but must be reasonably tight-fitting.
Gasketing: not prescriptively required by code, though NFPA 101 Annex A notes gasketing may not be necessary if the door is relatively tight-fitting. Many facilities install perimeter seals for added protection.
Pairs of doors: both the active and inactive leaf must have positive-latching hardware. Manual flush bolts on the inactive leaf of paired corridor doors are not permitted under NFPA 101 in healthcare occupancies.

What the codes do NOT require

Fire rating: most corridor doors in fully sprinklered healthcare facilities are not required to be fire door assemblies under current NFPA 101 or IBC.
Self-closing: not required for non-fire-rated patient room corridor doors. Staff is expected to close the door in a fire event.
NFPA 80 compliance: not required unless the specific door is a fire door assembly (horizontal exit doors, stairwell doors, hazardous area doors must still comply with NFPA 80).

The CMS vs NFPA 101 roller latch discrepancy that produces the most survey citations: NFPA 101 Section 19.3.6.3.2 permits roller latches in existing health care occupancies equipped with automatic sprinklers if the roller latch holds the door closed against a force of 5 pounds applied at the latch edge. CMS does not permit this exception. All CMS-regulated facilities (Medicare/Medicaid-certified hospitals, nursing facilities, and critical access hospitals) must use positive-latching hardware with an actual latch bolt on all corridor doors regardless of sprinkler status. The NFPA 101 exception is not available to CMS-regulated facilities. Facilities that specify roller latches based on the NFPA 101 exception without checking CMS applicability will receive a citation during their next Conditions of Participation survey.

Smoke Barrier Smoke Compartment Cross-Corridor Doors

What the codes require

Self-closing or automatic-closing: must close automatically when released. This requires a door closer or automatic closing device connected to the fire alarm system.
Positive latching: must latch when closed. Both leaves of paired smoke barrier doors require positive-latching hardware.
Smoke seals: must have perimeter seals or be constructed to resist smoke passage. Smoke barrier doors must minimize air leakage.
Arranged to minimize air leakage: hardware and door construction must minimize smoke passage from one compartment to the other at the operating pressure differential of a smoke control system.

The corridor door vs smoke barrier door confusion

The most common specification error in hospital projects is applying smoke barrier door requirements to all corridor doors, or applying patient room corridor door requirements to smoke barrier doors. A patient room corridor door does not need to be self-closing. A smoke barrier cross-corridor door does. The two door types have different requirements and they both exist in every hospital. Identifying which doors are smoke barrier doors vs patient room corridor doors from the fire protection drawings is the first step in correctly specifying hardware.

Browse LCN door closer parts for smoke barrier corridor doors at Security Parts.

Fire-Rated Fire Door Assemblies in Healthcare (Stairwells, Horizontal Exits, Hazardous Areas)

Which healthcare doors must be fire-rated

While patient room corridor doors are not required to be fire-rated in most fully sprinklered healthcare occupancies, specific categories of doors must still be fire-rated and must comply with NFPA 80: stairwell enclosure doors, horizontal exit fire doors between major building sections, hazardous area enclosure doors (boiler rooms, laboratories, storage rooms with significant combustibles), and corridor doors in non-sprinklered sections of a facility.

Stairwell doors: fire-rated per the applicable stairwell enclosure rating (90-minute in 2-hour enclosures, 60-minute in 1.5-hour enclosures)
Horizontal exit fire doors: must be fire-rated matching the fire wall rating
Hazardous area doors: typically 45-minute rated for 1-hour separation
All fire-rated doors in healthcare: must comply with NFPA 80, be self-closing, positively latch, and carry UL fire listing

Browse Von Duprin fire-rated exit device parts for healthcare stairwell doors at Security Parts.

Behavioral Health Psychiatric, Behavioral Health, and Memory Care Units

Unique requirements for high-risk patient environments

Behavioral health, psychiatric inpatient, and memory care units have requirements beyond standard healthcare corridor door compliance. The primary additional concern is anti-ligature: eliminating or minimizing hardware surfaces that can serve as anchor points for strangulation attempts. Anti-ligature hardware is required or strongly recommended by behavioral health facility standards and state regulatory guidance. The New York State Office of Mental Health Patient Safety Standard is the most widely referenced guidance document for anti-ligature hardware specification in the United States.

Anti-ligature door hardware on patient-accessible doors: no projecting levers, no exposed fasteners, no horizontal surfaces that can support a cord or belt
Anti-ligature hinges: flush-mounted or tamper-resistant
Anti-barricade function: ability for staff to override inside thumbturn with outside key to prevent patient from locking staff out
Chexit delayed egress on exit devices where wandering or elopement is a concern (memory care, dementia units)

Anti-Ligature Hardware: Products and Applications

Schlage HSLR High Security Ligature Resistant Trim (NYS-OMH Recommended)

Design and function

The Schlage HSLR uses a patented crescent-style handle design that eliminates the horizontal projecting surface of a standard lever. The crescent shape provides no horizontal platform for a ligature cord to rest on, making the standard over-the-lever strangulation setup much more difficult. The HSLR is recognized by the New York State Office of Mental Health Patient Safety Standard and has become the industry reference product for high-risk behavioral health applications.

Key override anti-barricade function

On four HSLR functions, an optional key override allows outside key operation to override the inside thumbturn when it is being held in the locked position. This anti-barricade function allows staff to enter a room where a patient is holding the inside thumbturn locked, without requiring forced entry. This is a critical safety feature for behavioral health private room doors: a patient in acute crisis who has barricaded themselves can be reached by staff with a key rather than requiring physical door breach.

Available formats

HSLR trim is available on both Schlage ND Series cylindrical locks and Schlage L Series mortise locks in mechanical and electrified versions. Browse Schlage ND Series HSLR cylindrical lock parts and Schlage L Series HSLR mortise lock parts at Security Parts.

Schlage SL1 (Lever) and SK1 (Knob) Ligature-Resistant Trim

Design and function

The SL1 (lever style) and SK1 (knob style) provide ligature resistance through a more streamlined, aesthetically integrated approach. The trim features recessed surfaces, sloped profiles, and concealed fastening hardware that minimize anchor points without the pronounced crescent shape of the HSLR. The SL1 lever is ADA compliant.

When SL1/SK1 is specified instead of HSLR

SL1 and SK1 are specified for behavioral health environments where the design aesthetic calls for less visually prominent anti-ligature hardware, or where the facility's risk assessment determines that the streamlined anti-ligature design is appropriate for the specific patient population. Both options are UL listed for 3-hour fire door applications. The spring-loaded fusible link inside the lock case provides fail-secure mode in a fire event even when the lock is electrically unlocked. Key override anti-barricade is also available on four SL1/SK1 functions.

Browse Schlage L Series SL1 and SK1 ligature-resistant mortise lock parts at Security Parts.

Anti-Ligature Hardware Comparison

Feature	Schlage HSLR	Schlage SL1/SK1
Anti-ligature design	Crescent-style; maximum ligature resistance	Recessed/sloped; moderate ligature resistance
NYS-OMH recommendation	Yes (primary recommendation)	Not specifically named
ADA lever compliance	Check function by function	SL1 lever: Yes; SK1 knob: No
Anti-barricade key override	Available on 4 functions	Available on 4 functions
Fire door listing	UL listed	UL listed (3-hour fire door)
Electrified versions	Yes	Yes
Aesthetic integration	Distinctive crescent shape	Streamlined; less visually distinct
Typical application	High-risk behavioral health, psychiatric inpatient	Lower-acuity behavioral health, mixed-use hospital floors

The Schlage HL Series Hospital Latch: Hands-Free Operation for Clinical Staff

The Schlage HL Series is a mortise lock with a large paddle-shaped actuator rather than a standard lever. When a staff member approaches a patient room door with both hands occupied (carrying medication trays, IV bags, meal trays, or medical supplies), the paddle can be operated with an elbow or forearm push without putting down what they are carrying or touching the handle surface with a contaminated glove.

This hands-free capability serves two important purposes: it reduces the time required for clinical staff to enter and exit patient rooms rapidly (important in emergency response situations), and it reduces the number of hand-to-hardware contact events during a clinical day, supporting infection control practices.

HL Series Configurations

The HL Series is available in several function configurations: passage (both paddles always retract latch), privacy (inside thumbturn blocks outside paddle), and access control functions where the outside paddle is electrically locked or unlocked. Key override on three functions allows outside key to retract the deadbolt and/or latchbolt to override an inside thumbturn being held in the locked position.

The HL Series is compatible with Von Duprin 9875/9975 mortise exit devices for healthcare corridor doors that also require exit device egress hardware. An optional 1/8-inch thick lead lining inside the lock case is available for X-ray rooms and other areas with radiation concerns. Browse Schlage HL Series hospital latch and electrified mortise lock parts at Security Parts.

Von Duprin INPACT 94/95 Series: Recessed Exit Device for Medical Equipment Environments

Standard exit devices project from the door face, creating a protrusion that medical equipment (IV poles, gurneys, wheelchairs, rolling carts) can collide with during transport through corridor doors. The Von Duprin 94/95 INPACT Series features a recessed push pad that is fully integrated within the door face, eliminating the protruding push bar that standard devices present.

The INPACT design serves two purposes in healthcare environments: it protects the device from impact damage during high-traffic medical equipment transport (extending device service life), and it eliminates the protruding hardware surface that can catch IV tubing, patient gowns, and other items during passage through the door. The INPACT is available in fire-rated versions for hospital stairwell and fire separation doors.

Browse Von Duprin 94/95 INPACT Series exit device parts at Security Parts.

Antimicrobial Finishes: Infection Control Between Cleaning Cycles

Door hardware is among the highest-touch surfaces in any building, and in a healthcare facility those touch events involve patients, staff moving between rooms, and visitors from outside the controlled environment. Standard door hardware cleaning protocols reduce bacterial load at the time of cleaning, but bacteria recolonize touch surfaces within hours of cleaning in a hospital environment.

Antimicrobial hardware finishes incorporate silver-based antibacterial agents into the surface coating layer. Silver ions continuously disrupt bacterial cell membrane function, reducing bacterial recolonization rates on the hardware surface between cleaning cycles. Allegion market research from 2021 found that 90 percent of hospital respondents used antimicrobial finishes in their facilities, with silver-based coating the most common type.

Antimicrobial Finish Options on Von Duprin and Schlage Hardware

Von Duprin offers antimicrobial finishes on exit devices and trim: US26D-AM (antimicrobial satin chrome) and US32D-AM (antimicrobial satin stainless steel). Schlage offers antimicrobial coating options on ND Series and L Series hardware in similar finish codes with the AM suffix. The antimicrobial coating is applied over the standard plated or stainless finish without changing the visual appearance of the hardware.

The antimicrobial finish limitation that most healthcare procurement teams miss: Antimicrobial finishes with silver-based agents are effective against bacteria. They have not been demonstrated to reduce viral transmission, including COVID-19 and similar respiratory viruses. A facility that specifies antimicrobial hardware finishes with the expectation that they will reduce viral HAI (hospital-acquired infection) risk may be making a procurement decision based on a misunderstanding of the technology. Antimicrobial finishes are the correct specification for bacterial HAI reduction on high-touch surfaces; they are not a substitute for viral infection control protocols such as cleaning frequency, surface disinfectants, and air filtration.

Browse Von Duprin antimicrobial exit device and trim parts at Security Parts.

Delayed Egress in Healthcare: Chexit for Memory Care and Behavioural Health

Memory care (dementia units) and behavioral health facilities face the clinical challenge of preventing patients from leaving the unit unsupervised (elopement) while maintaining code-compliant emergency egress capability. Standard locked doors would violate life safety code egress requirements. The Von Duprin Chexit delayed egress system addresses this directly.

The Chexit holds the door secured for 15 seconds after the push bar is pressed while an internal alarm sounds, then releases to permit egress. Staff can respond to the alarm within the 15-second window to address the exit attempt. On fire alarm, the Chexit releases immediately without delay. This meets NFPA 101 Section 7.2.1.6.1 requirements for delayed egress in healthcare occupancies and is specifically contemplated for behavioral health and memory care applications. Browse Von Duprin Chexit delayed egress exit device parts at Security Parts.

Why Choose Security Parts for Healthcare Door Hardware Parts

Hartford Hospital roller latch history, CMS vs NFPA 101 exception documentation, both-leaf paired door requirement, antimicrobial bacterial-only limitation, and same-day OEM shipping.

CMS vs NFPA 101 Roller Latch

We document that CMS prohibits roller latches absolutely, while NFPA 101 allows them in some sprinklered existing occupancies. Facilities specifying roller latches based on the NFPA 101 exception without checking CMS applicability receive survey citations. This discrepancy is not documented by any competitor at the parts ordering level.

Both Leaves Paired Corridor Door

We document the NFPA 101 requirement that both leaves of paired corridor doors in healthcare must have positive-latching hardware. The inactive leaf cannot have manual flush bolts. This is missed in many projects and generates cited deficiencies.

Antimicrobial Bacterial-Only

We document that antimicrobial hardware finishes are effective against bacteria but have not been demonstrated effective against viruses. This prevents procurement decisions based on a misunderstanding of what the technology actually does.

Same-Day OEM Shipping

Healthcare-specified OEM parts from Von Duprin, Schlage, and LCN ship same day from US warehouses. Call 845-935-0301 or the contact page for healthcare specification support.

What Makes Security Parts Different for Healthcare Hardware Parts

We document the Hartford Hospital fire history behind the roller latch prohibition, explaining why CMS enforces the prohibition absolutely without the NFPA 101 sprinklered-existing-occupancy exception. Understanding the history explains why CMS does not grant the exception that NFPA 101 allows.
We document the paired corridor door both-leaves requirement from NFPA 101, which prohibits manual flush bolts on the inactive leaf of paired healthcare corridor doors. This is missed in specifications that apply standard commercial pairing practices to healthcare corridor doors.
We document the defend-in-place model as the governing operational logic that drives all healthcare door hardware requirements. Every specification decision connects to the smoke compartment and horizontal evacuation framework that the defend-in-place model creates.
We document the antimicrobial finish bacterial-only limitation: silver-based antimicrobial finishes reduce bacterial recolonization but have not been demonstrated effective against viral transmission. Healthcare facilities specifying antimicrobial hardware for viral HAI reduction are making a decision not supported by the technology's proven efficacy.
We carry Schlage HSLR anti-ligature cylindrical lock parts, Schlage L Series SL1 SK1 HL Series parts, Von Duprin INPACT and antimicrobial exit device parts, and LCN door closer parts for complete healthcare hardware specification in one order.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Healthcare Facility Door Hardware

Are patient room corridor doors in hospitals required to be fire-rated?

No, in most cases. Current NFPA 101 and IBC do not require most corridor doors in fully sprinklered healthcare facilities to be fire door assemblies. The defend-in-place model relies on closed patient room doors containing smoke for horizontal evacuation, not on fire-rated barriers. However, these doors must have positive-latching hardware and must be constructed to resist smoke passage. Stairwell doors, horizontal exit doors, and hazardous area doors in healthcare facilities must still be fire-rated and comply with NFPA 80.

Why are roller latches prohibited in CMS-regulated healthcare facilities?

Roller latches hold doors closed through friction, not mechanical latch engagement. Under fire pressure, roller latch friction can fail, allowing the door to push open. Hartford Hospital's fire demonstrated this failure mode with tragic results. NFPA 101 eliminated roller latches in most healthcare corridor applications. CMS prohibits roller latches absolutely in CMS-regulated facilities (Medicare/Medicaid-certified hospitals, nursing homes, critical access hospitals), with no exception for the NFPA 101 sprinklered-existing-occupancy allowance that permits them in some non-CMS facilities.

What is anti-ligature door hardware and when is it required?

Anti-ligature hardware minimizes or eliminates surfaces that can anchor a cord, belt, or sheet used in a strangulation attempt. Required or strongly recommended in behavioral health, psychiatric inpatient, and memory care areas. Over 70 percent of inpatient hospital suicide attempts from 2010-2017 used a ligature, and approximately 54 percent used door hardware as the anchor. The Schlage HSLR crescent trim is the NYS-OMH-recommended anti-ligature standard for high-risk applications. The Schlage SL1/SK1 provides a more streamlined alternative for lower-acuity environments.

What is the Schlage HL Series hospital latch and where is it used?

The HL Series replaces a standard mortise lever with a large paddle actuator operable with an elbow or forearm for hands-free entry when both hands are occupied. Used on patient room doors, exam room doors, and medication room doors where clinical staff frequently enter while carrying supplies or wearing gloves. Available in mechanical and electrified functions with key override anti-barricade on three functions. Compatible with Von Duprin 9875/9975 mortise exit devices for combined access control and egress hardware on the same opening.

What is an antimicrobial finish on door hardware and what does it actually do?

Antimicrobial finishes incorporate silver-based agents that reduce bacterial recolonization on high-touch surfaces between cleaning cycles. They are effective against bacteria but have not been demonstrated to reduce viral transmission. Von Duprin offers US26D-AM and US32D-AM antimicrobial finishes on exit devices and trim; Schlage offers similar AM-suffix options on ND and L Series hardware. Ninety percent of hospital respondents in a 2021 Allegion study used antimicrobial finishes. They supplement but do not replace regular cleaning and disinfection protocols.

What is the defend-in-place evacuation model and how does it determine healthcare door hardware requirements?

Defend-in-place is the evacuation strategy for healthcare facilities where many patients cannot be evacuated vertically. In a fire, staff closes patient room doors to contain smoke and moves patients horizontally into adjacent smoke compartments rather than out of the building. This model drives all healthcare door hardware requirements: corridor doors must positively latch (not roller latch) to hold closed under fire pressure; smoke barrier cross-corridor doors must self-close, latch, and seal; and patient room doors do not need to be fire-rated in sprinklered facilities because horizontal evacuation is the expected response, not vertical evacuation.

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Von Duprin 9947 CVR Exit Device Parts Guide: Latch Kits, Rods, Dogging, and Ordering for the 98/99 Series Monday, August 3, 2026

If you are searching for Von Duprin 9947 CVR exit device parts, this guide gives you everything needed to identify the correct components, understand the configuration differences, and order without a return. The 9947 is the concealed vertical rod designation in the Von Duprin 98/99 series, one of the most widely installed institutional exit device families in North America. Because devices in this series have been in service for decades, identifying the correct part requires knowing the manufacture date, the panic or fire configuration, the metal door or wood door variant, and the dogging type. Every part number and specification in this guide is sourced directly from the official Von Duprin 98/9947 Series Parts Manual and Installation Instructions.

Browse the Von Duprin 98/9947 CVR parts catalog at SecurityParts.com, or browse the complete Von Duprin parts catalog for the full range of 98/99 series components.

What Is the Von Duprin 9947 CVR Exit Device

The Von Duprin 9947 is a concealed vertical rod (CVR) exit device in the 98/99 series. CVR means the vertical rods that connect the push bar to the top and bottom latches run inside the door stile rather than along the door face. When someone presses the push bar, both the top latch at the door head and the bottom latch at the threshold retract simultaneously, releasing the door. No rods are visible on the door surface.

This configuration is specified in three situations: double doors without a center mullion that require top and bottom engagement, architectural environments where exposed surface rods are not acceptable, and high-traffic institutional openings in hospitals, schools, and government buildings where door face cleanliness is a maintenance or design requirement.

The 9947 carries ANSI/BHMA A156.3 Grade 1 certification as part of the 98/99 series. It is available in panic and fire exit hardware versions, with multiple dogging options, electrified upgrade paths, and monitoring options. For an overview of how the 9947 fits within the broader Von Duprin product family, see the Von Duprin series guide and the Von Duprin exit device series comparison.

Von Duprin 98/9947 CVR concealed vertical rod exit device. OEM replacement parts including latch kits, rod assemblies, dogging components, and electrified options available at SecurityParts.com.

Von Duprin 9947 vs 9847: Understanding the Model Number Difference

The most common source of confusion when ordering parts for a CVR exit device in the 98/99 series is the 9947 versus 9847 designation. These are not two separate products. They are two naming designations for the same concealed vertical rod configuration, used at different points in the product history.

The 9847 designation was used on devices manufactured through the mid-to-late 1990s. The 9947 is the current active designation. The physical rod hardware, latch assemblies, mechanism case, and baseplate are functionally identical between the two designations. When a service manual or parts catalog lists a part as compatible with "98/9947," it applies equally to devices labeled 9847 on the door, provided the manufacture date falls within the same era.

The prefix digit is a separate matter. The 98-prefix (as in 9847, 9849, 9850) designates a smooth mechanism case. The 99-prefix (as in 9947, 9949, 9950) designates a grooved mechanism case. Both use the same internal parts. The grooved case on 99-series devices provides a better grip surface on high-contact institutional openings, which is why healthcare and educational facility specifications often call for the 99-prefix specifically.

For a complete guide to the 9847 CVR configuration and its part numbers, see the Von Duprin 9847 CVR exit device parts guide at SecurityParts.com. The 9847 and 9947 guides cross-reference each other for shared parts.

How to Read the Von Duprin 9947 Model Number

The full model designation on a Von Duprin 9947 CVR device appears on a label near the mechanism case housing on the hinge side of the device body. Reading this label correctly determines which replacement parts apply before any order is placed.

What the Prefix Tells You

The 98 prefix means smooth mechanism case. The 99 prefix means grooved mechanism case. Both prefixes share the same internal parts and latch kits. The mechanism case itself is listed separately by prefix when ordering because the case housings differ in texture.

What the Suffix Tells You

No suffix after 9947 means a standard panic exit hardware device. Cylinder dogging and hex dogging are permitted. The -F suffix (9947-F) means fire exit hardware. Dogging of any kind is prohibited, and the latch mounting bracket count per latch doubles from one to two. WDC suffix means Wood Door Concealed, a configuration with dedicated rod kits that are not interchangeable with metal door rod kits. LBR suffix means Less Bottom Rod, a fire device configuration that omits the bottom vertical rod and uses a spring-loaded floor latch instead.

The Manufacture Date: Why It Determines Your Parts

The manufacture date stamp on the device label is the single most important piece of information for ordering dogging components on the 9947. Two separate date thresholds create three distinct generations of replacement parts:

Devices shipped before August 1997: Use old-style dogging replacement kit 050153. This kit includes the old-style hex dog shaft 968112, the old-style dogging hook 969941, hitch pin 963909, and the CD actuator arm 968116 for CD-dogging configurations. Current-specification dogging parts do not fit these earlier devices.

Devices shipped between August 1997 and January 2002: Use current-specification dogging parts, hex dogging shaft 090040, dogging adapter 090043, dogging adapter spring 090042. The newer-style end cap kit (050014) can also be used on these devices, but requires that the mechanism case and cover plate on the hinge stile have a square cut and a clean edge.

Devices shipped after January 2002: Current-specification parts apply across all assemblies. No legacy substitutions needed.

A second date threshold applies to electrified devices only: the EL solenoid replacement kit 050218 is a legacy kit for devices shipped before January 1987. This kit replaces old-style EL solenoid parts with the new style. If you have a pre-1987 EL9947 device, this kit restores electrified function without replacing the entire device.

Von Duprin 9947 Configurations: Choosing the Correct Parts Path

Before ordering any replacement part for a Von Duprin 9947 CVR device, confirm all four of the following:

Panic or Fire Exit Hardware

Look for the -F suffix in the model number. Fire hardware fundamentally changes which parts apply. Fire devices require two latch mounting brackets per latch (panic uses one), have no dogging capability of any kind, use a different center case kit (050022 for fire vs standard panic center case kit), and require a center case cover kit (050073) that includes parts for a three-piece cover conversion. Ordering panic latch kits for a fire device results in the wrong bracket count every time.

Metal Door or WDC Wood Door Concealed

Metal door and WDC variants use different rod kits that are not interchangeable. The WDC designation appears in the model number. If the device is in a wood door, the WDC-specific top rod (050582) and WDC-specific bottom rod kit (050583) apply. Metal door installations use top rod 050574 and bottom rod kit 050575. Using metal door rod kits on a WDC installation will not produce the correct fit or engagement geometry.

Door Width: 3-Foot or 4-Foot Device

The push bar retrofit kit (PBKIT) and some mechanism case components are door-size specific. A 3-foot device uses a different PBKIT from a 4-foot device, and the mechanism cases are also listed separately: 99 Series mechanism case for 3-foot (968144), 99 Series mechanism case for 4-foot (968146), 98 Series mechanism case for 3-foot (970191), 98 Series mechanism case for 4-foot (970192). Always measure door width before ordering push bar or mechanism case components.

Manufacture Date

As described above: pre-August 1997 devices use old-style dogging parts (050153 kit). Post-1997 devices use current-specification dogging parts. This is the one variable that cannot be determined from the model number alone, it requires reading the date stamp on the label.

Von Duprin 9947 Latch Kits and Rod Assemblies

Latch assemblies and vertical rod kits are the most frequently replaced components on CVR exit devices. They wear at pivot points and latch bolt faces on high-cycle openings and are the first parts to check when a door is not latching properly at the top or bottom. All part numbers below apply to both the 9847 and 9947 designations on post-1997 devices.

Latch Kits, Metal Door Configurations

050492, 98/9947 Top Latch Kit. Replaces the top latch assembly at the door head. Each kit includes one latch mounting bracket. Panic devices use one bracket per latch (one total per top latch). Fire devices use two brackets per latch (two total per top latch).

050493, 98/9947 Bottom Latch Kit. Replaces the bottom latch assembly at the door threshold. Does not apply to LBR (Less Bottom Rod) fire devices, which use a separate fire latch kit. Same bracket quantity rules as the top latch kit.

109324, 98/9947 Latch Mounting Bracket. The bracket that mounts the latch case to the door preparation. Panic device: one per latch, two total for both latches. Fire device: two per latch, four total. This is the part most frequently under-ordered, confirm device type before determining quantity.

Latch Retrofit Kits: Converting 9947 to 9948 Latch Design

When a 9947 latch assembly is worn beyond individual component replacement, or when individual latch parts for the 9947 design are no longer available separately, retrofit kits convert the original 9947/9847 latch to the updated 9948 latch system. Retrofit kits include items equivalent to the top and bottom latch kits plus one mounting bracket per latch.

050047, 98/9948 Latch Retrofit Kit (non-EL). For panic devices. Includes parts to convert the original 98/9947 latch to the 98/9948 system.

050048, 98/9948-F Latch Retrofit Kit (non-EL). For fire-rated devices.

050522, EL98/9948 Latch Retrofit Kit. For panic devices with electric latch retraction.

050523, EL98/9948-F Latch Retrofit Kit. For fire-rated devices with electric latch retraction.

Call 845-935-0301 before ordering retrofit kits on older 9947 devices. SecurityParts.com pre-order support can confirm which kit applies to your specific device before the order ships.

Vertical Rod Kits

050574, Adjustable Top Rod, metal door, standard door height range of 6 feet 8 inches to 8 feet 4 inches. The top rod is adjustable to match door height and must be set before hanging the door to achieve correct latch bolt engagement at the top strike.

050575, Adjustable Bottom Rod Kit, metal door. Includes the rod and adjustment hardware. The bottom rod adjustment sets the clearance between the bottom latch bolt and the floor or bottom strike.

050582, WDC Adjustable Top Rod, wood door concealed variant only. Not interchangeable with metal door top rod 050574.

050583, WDC Adjustable Bottom Rod Kit, wood door concealed variant only. Not interchangeable with metal door bottom rod kit 050575.

Rod Connecting Screws

090071, 98/9947 Rod Connecting Screw (package of 2). Used to connect rods on 9947-design devices.

090072, 98/9948 Rod Connecting Screw (package of 2). Used after converting to the 9948 latch retrofit system.

900620, 98/9947 Adjusting Screw Package (package of 2). The screws used to fine-tune top and bottom rod engagement at the latch bolts.

900898, 98/9947 Adjusting Screw LBR Package. The adjusting screw package specific to Less Bottom Rod fire configurations.

Von Duprin 9947 Baseplate and Dogging Assembly Parts

The baseplate assembly contains the dogging mechanism that holds the push bar in the depressed position during business hours. Dogging parts wear most quickly on high-traffic doors where the hex key is used multiple times daily.

Current-Specification Dogging Parts (Post-August 1997 Devices)

090040, Hex Dogging Shaft (package of 2). The most commonly replaced dogging component on the 9947. The shaft strips when a misaligned or improperly seated hex key is forced into the dogging socket. Replace whenever the push bar will not stay dogged or requires unusual force to dog.

Von Duprin 090040 Hex Dogging Shaft (package of 2), the most commonly replaced dogging component on the 9947. In stock at SecurityParts.com.

090042, Dogging Adapter Spring (package of 2). The spring that locks the dogging adapter into the mounting bracket. Fatigue failure on high-cycle doors presents as a push bar that releases from the dogged position prematurely.

090043, Dogging Adapter (package of 2). The housing the dogging shaft and adapter spring fit through. Inspect the adapter for cracks whenever the shaft is replaced.

090085, 227 Dog Key, 5/32-inch hex (package of 10). The hex key used for field dogging of the 9947 push bar.

090005, 227 Dog Key, 5/32-inch hex (package of 2). Smaller quantity of the same dogging hex key.

Old-Style Dogging Service Replacement Items (Pre-August 1997 Devices)

For devices shipped before August 1997, use only the following old-style parts. Current-specification dogging parts do not fit these earlier devices.

050153, Old Style Hex Dogging Replacement Kit. The complete kit for restoring dogging function on pre-August 1997 devices. Includes the old-style hex dog shaft, dogging hook, and hitch pin.

968112, Old Style Hex Dog Shaft. Individual shaft component from the legacy assembly.

969941, Old Style Dogging Hook.

963909, Number 22 Hitch Pin (Hex/CD Dogging, Old Style).

968116, Old Style CD Actuator Arm. For cylinder dogging configurations on pre-August 1997 devices.

Cylinder Dogging (CD) Components, Panic Devices Only

107813, Cylinder Mounting Package. Required when installing or replacing cylinder dogging on the 9947. Includes the cylinder collar, locating washer, and locknut.

090046, CD Dogging Plug (package of 2). Seals the cylinder dogging access hole in the mechanism case on CD-equipped devices.

090045, CD Actuator Arm (package of 2). Connects the mortise cylinder rotation to the dogging mechanism. Cylinder dogging is available on panic devices only; it cannot be installed on fire-rated 9947-F devices.

Von Duprin 107813 Cylinder Dogging Kit, required for installing or replacing cylinder dogging on panic-configuration 9947 devices. Includes cylinder collar, locating washer, and locknut. In stock at SecurityParts.com.

Von Duprin 9947 Mechanism Case, End Cap, and Center Case Assembly

Mechanism Case

968144, 99 Series Mechanism Case, 3-foot door (finished item, specify finish).

968146, 99 Series Mechanism Case, 4-foot door (finished item, specify finish).

970191, 98 Series Mechanism Case, 3-foot door (finished item, specify finish).

970192, 98 Series Mechanism Case, 4-foot door (finished item, specify finish).

End Cap Assembly

050014, 98/99 Series End Cap Kit (finished item). The current-specification end cap kit for all post-January 2002 devices and for pre-2002 devices where the mechanism case and cover plate have a square cut and a clean edge.

050524, Impact Resistant End Cap Bracket. The reinforced bracket inside the end cap assembly for high-abuse openings.

090036, Cover Plate Anti-Rattle Spring (package of 10). Prevents rattling of the cover plate at the end cap on installed devices.

900597, Device End Cap and Center Case Screw Package (finished item). The hardware package covering mounting screws for both the end cap and center case.

Old-style end cap components for pre-January 2002 devices: 900905 (old-style end cap and bracket assembly), 970548 (old-style cover plate stop), 900901 (old-style end cap screw package), and finish-specific end cap options 971082 (stainless steel), 971083 (brass), 971084 (bronze), 971085 (aluminum).

Center Case Assembly, Fire Devices

050022, 98/9947-F Center Case Kit Less Cover. The center case kit for fire-rated 9947 devices. Does not include the cover.

050073, 98/9947-F Center Case Cover Kit (finished item). Includes parts for the three-piece cover conversion on fire devices. Specify finish when ordering.

Other Center Case Components

050491, Shock Absorber and Holder Assembly. Absorbs impact when the push bar returns from the fully depressed position.

050529, 98/99 Series Control Link Pin and Retaining Ring.

090031, 98/99 Series Control Link Pin (package of 10).

050564, Center Case Cover Bracket.

900892, Center Case Cover Screws (package of 4, finished item).

090049, Push Bar Guide (package of 10).

Von Duprin 9947 Springs and Internal Pins

Springs and pins are the smallest components in the 9947 assembly and often the least expensive, but fatigue failure in any spring causes immediate operational symptoms. All are sold in multi-unit packages because field replacement typically uncovers adjacent spring wear at the same time.

090065, Bolt Return Spring (package of 10). Returns the latch bolt to the extended (latched) position after the push bar is released. Failure presents as a latch bolt that does not fully extend after the push bar is released.

090066, Top Latch Compression Spring (package of 10). Applies closing force to the top latch bolt. Fatigue failure presents as a top latch that does not fully extend or that requires the door to slam to engage the top strike.

090069, Ratchet Lever Spring (package of 2). Part of the ratchet release assembly. Replace whenever the ratchet release does not snap positively.

090064, Latch Link Pin (package of 10). Connects the latch link to the latch case at the pivot point. Wear at the pin bore on high-cycle installations causes latch movement to feel loose before full failure occurs.

090062, Bottom Latch Case Spirol Pin (package of 10). Retains the bottom latch assembly components within the latch case.

090063, Retaining Ring (package of 10). Secures the rod assembly at the latch connection points.

090039, Latch Return Spring (package of 10). Returns the latch to the engaged position on high-cycle openings. Fatigue failure is more common on exterior openings exposed to temperature cycling.

970978, 98/9947 Ratchet Release Spacer. The spacer used in the ratchet release assembly that allows rod length adjustment.

LBR (Less Bottom Rod) Fire Device Configuration

The LBR configuration is a fire exit hardware variant of the 9947-F that omits the bottom vertical rod. Rather than a rod engaging a bottom strike in the door threshold, the LBR uses a spring-loaded bottom latch that sits flush with the door bottom when released. This configuration is used where a threshold would create a tripping hazard, in facilities requiring ADA-compliant accessible thresholds, or where floor conditions do not permit a standard bottom strike installation.

The LBR configuration requires its own fire latch kit, separate from the standard 9947-F latch kit. It also uses the LBR-specific adjusting screw package 900898 rather than the standard 900620. Never order a standard 9947-F latch kit for an LBR configuration, the parts differ and will not install correctly.

Confirm LBR status from the model label before ordering any latch or rod components on a fire-rated 9947-F device. If the model shows 9947-F LBR or 9947WDC-F LBR, use the LBR-specific latch kit and the LBR adjusting screw package.

Fire Exit Hardware Rules Under NFPA 80: What the 9947-F Requires

The Von Duprin 9947-F fire exit hardware version carries requirements under NFPA 80 that do not apply to the panic version. Facility managers and service technicians working on fire-rated CVR openings need to understand these requirements before replacing any component.

Positive Latching on Every Cycle

A fire-rated 9947-F device must positively latch at both the top and bottom strike on every door close without any assistance. After replacing any latch component on a fire device, test the door by releasing it from fully open without pushing or assisting the close. Both latch bolts must engage their respective strikes fully under the spring force alone. A top or bottom latch that does not fully engage after parts replacement is a NFPA 80 deficiency that will be cited on the next annual fire door inspection. This is why the fire device uses two latch mounting brackets per latch rather than one, the additional bracket increases the mechanical advantage of the spring return.

No Dogging of Any Kind

NFPA 80 Section 4.7.1 prohibits any device that holds a fire door in the open position in a manner not connected to the building fire alarm system. Mechanical dogging, including hex dogging and cylinder dogging, cannot be installed or used on a 9947-F fire device. If a 9947-F device in your facility has a hex dogging mechanism installed, it is a fire code violation. This must be corrected before the next NFPA 80 annual fire door inspection. For guidance on fire door hardware compliance, see the commercial door fire rating guide.

OEM Parts Only to Maintain UL Listing

Only OEM replacement parts maintain the UL fire listing on the 9947-F device. Aftermarket latch kits, rod assemblies, or center case components installed on a fire-rated device can void the UL fire listing and create documented liability during an NFPA 80 fire door assembly inspection. For the complete case for OEM parts on fire-rated hardware, see the OEM vs aftermarket commercial door hardware parts guide.

Monthly Inspection Requirement

The official Von Duprin installation documentation specifies routine maintenance at intervals of not more than one month for fire-rated CVR devices. Monthly checks should confirm all components are in satisfactory working condition, the operating force to release the exit device has not changed significantly from the force recorded at original installation, the top and bottom strikes are clean and free from obstruction, the device has appropriate lubrication, no additional locking devices have been added to the door since installation, and all fixing screws are tight. Documenting these inspections is required for NFPA 80 compliance and provides evidence of proper maintenance if a device failure is ever disputed.

Electric Latch Retraction Options on the Von Duprin 9947

The Von Duprin 9947 supports three electrified upgrade options that convert a mechanical CVR device to provide remote latch release capability. All three options are available on panic versions only. None are available on fire-rated 9947-F devices.

EL, Electric Latch Retraction

The EL9947 designation indicates a device with electric latch retraction. When the access control panel sends a signal, the solenoid retracts both CVR latches simultaneously, releasing the door without anyone pressing the push bar. The push bar can still be pressed manually for egress at any time. EL function on the 9947 is a field-installable addition to an existing mechanical device via an EL solenoid kit.

For devices shipped before January 1987, the EL solenoid replacement kit 050218 replaces old-style EL solenoid parts with the new style. This kit is the correct solution for restoring EL function on pre-1987 EL9947 devices without replacing the full device.

HD-EL, Hex Dogging with Electric Latch Retraction

The HD-EL9947 designation adds hex dogging capability to an electrified device. HD-EL allows the push bar to be manually dogged in the depressed position independently of the EL function, providing both electronic latch release for access control and manual hold-open capability for high-traffic periods. HD-EL9947 uses dedicated dogging rod kits: EL dogging rod kit for 3-foot door (050531) and EL dogging rod kit for 4-foot door (050532).

QEL, Quiet Electric Latch Retraction

The QEL designation indicates quiet electric latch retraction, a motorized, slower-speed latch retraction that produces significantly less noise and mechanical shock than the standard EL solenoid actuation. QEL is specified for healthcare settings, executive offices, and other environments where the click and thud of standard EL activation is unacceptable. For a detailed comparison of EL and QEL across the 98/99 series, see the Von Duprin QEL vs MEL guide.

For more information on access control integration with electrified exit devices including the 9947 series, see the Von Duprin electric strike parts guide for the frame-side components that work alongside electrified CVR devices.

RX and LX Monitoring Options on the Von Duprin 9947

RX: Request to Exit

RX places a switch in the push bar that closes when the push bar is depressed for egress. The signal tells the access control panel that a valid exit is occurring from the secured side, suppressing the forced-entry alarm that would otherwise trigger when the door opens without a credential presentation from the exterior. RX is the standard monitoring option for electrified 9947 installations connected to a modern access control panel. Without RX, every interior push bar activation generates a false alarm at the panel.

LX: Latch Bolt Monitor

LX monitors the latch bolt position in real time, signaling the access control panel whether the latch is extended (door latched) or retracted (door not latched). Unlike a standard door position switch that only signals whether the door is open or closed, LX specifically monitors the latch state. This distinction matters on fire-rated openings where a door that is physically closed but not latched represents a NFPA 80 deficiency. LX is specified on openings with latch compliance monitoring requirements, high-security applications where verifying the door is truly secured is required, and inspection programs that generate automated alerts on latch failure events.

Troubleshooting Common Von Duprin 9947 CVR Problems

Most field failures on the Von Duprin 9947 trace back to a small number of recurring causes. The following troubleshooting guide addresses the most common issues encountered on installed CVR devices.

Top Latch Does Not Fully Engage the Top Strike

Causes in order of frequency: top latch compression spring 090066 has fatigued and no longer provides sufficient force to drive the latch bolt into the strike; top rod adjustment has shifted, causing the latch bolt to engage the strike at an incorrect height; the top strike ratchet release is misaligned and retaining the latch bolt in the retracted position after the door closes. Check spring condition first, then rod adjustment, then ratchet release alignment per the Von Duprin installation instructions adjustment procedure.

Bottom Latch Does Not Engage the Bottom Strike or Floor Strike

Causes: bottom rod adjustment set incorrectly, placing the latch bolt above or below the floor strike pocket; bottom latch bolt return spring 090065 fatigued; bottom adjusting screw 900620 has backed out, changing the rod length; on WDC configurations, metal door rod kit installed instead of WDC-specific kit 050583, geometry mismatch prevents correct engagement.

Push Bar Will Not Dog or Releases from Dogged Position Prematurely

For post-1997 devices: hex dogging shaft 090040 is stripped, most common cause; dogging adapter spring 090042 has fatigued, second most common; dogging adapter 090043 is cracked, inspect whenever the shaft is replaced. For pre-1997 devices: use old-style hex dogging replacement kit 050153. Do not attempt to install current-specification dogging parts on pre-August 1997 devices.

Push Bar Returns Slowly or Incompletely After Being Pressed

Causes: latch return spring 090039 has fatigued on one or both latches; shock absorber and holder assembly 050491 has deteriorated, adding drag to the push bar return cycle; push bar guides 090049 are worn, causing friction in the push bar travel path.

Latch Bolt Movement Feels Loose or Sloppy Before Full Failure

Latch link pin 090064 has worn at the pin bore, the primary cause of loose latch movement before the latch fails to engage altogether. Inspect and replace latch link pins at both the top and bottom latch when this symptom appears, since the wear pattern is typically symmetric on high-cycle openings.

Top Latch Retracted but Does Not Return on Door Close

The ratchet release mechanism is not releasing the top latch bolt when the door closes. Check ratchet release plunger position in the door, it must pass through the hole in the door and be adjusted so the plunger triggers the latch release when the door is fully closed. Also check ratchet lever spring 090069 for fatigue.

EL9947 Device Latches Do Not Retract on Signal

For devices shipped after January 1987: confirm the solenoid is receiving correct voltage at the device terminals. Confirm the EL dogging rod kit is correctly installed if the device is an HD-EL configuration. If the signal voltage is correct and the latch does not retract, the EL solenoid assembly requires replacement. For devices shipped before January 1987: use EL solenoid replacement kit 050218 to replace old-style solenoid components with the current style before concluding the device needs full replacement.

How to Order Von Duprin 9947 Parts Without a Return

Commercial door hardware returns on exit devices are time-consuming and often hold up repairs on critical openings. Confirming five pieces of information before placing any order prevents the most common mis-orders on the 9947.

Confirm Panic or Fire Exit Hardware

The -F suffix confirms fire hardware. Without -F is panic. This single distinction changes latch mounting bracket quantities, dogging parts applicability, center case kit selection, and center case cover kit selection.

Confirm Metal Door or WDC

WDC appears in the model number. Metal door and WDC rod kits are not interchangeable.

Confirm Door Width

Measure the door width. Mechanism cases, push bar retrofit kits, and some baseplate components differ between 3-foot and 4-foot devices.

Confirm the Manufacture Date

Read the date stamp on the device label. Dogging parts differ across the August 1997 threshold. End cap kits differ across the January 2002 threshold. EL solenoid parts differ across the January 1987 threshold.

Confirm Whether the Device Has Cylinder Dogging

A mortise cylinder slot in the mechanism case confirms CD dogging. CD-equipped devices have the dogging plug 090046 and CD actuator arm 090045 as active assembly components. Non-CD devices do not have these parts installed.

Call 845-935-0301 before ordering latch kits on an older 9947 device. SecurityParts.com pre-order support can confirm which latch system applies to your specific device, current 9947 latch kits or the 9948 retrofit kit, before the order ships.

Von Duprin 9947 vs Other 98/99 Series CVR Configurations

Von Duprin 98/99 Series exit device parts at SecurityParts.com, OEM replacement components for CVR, SVR, and rim configurations including the 9947 and 9847 concealed vertical rod series.

The 9947 is one of three CVR configurations in the 98/99 series. Understanding the full CVR family helps when specifying replacements or comparing device options.

9947 (Standard CVR, Standard Rod)

The 9947 uses adjustable vertical rods connecting the push bar to the top and bottom latch assemblies. Rods run inside the door stile. This is the standard CVR configuration for metal and wood door applications up to 8 feet 4 inches in door height. The 9947 is the most widely installed CVR configuration in the 98/99 series.

9949 (CVR, Standard Rod, Additional Configuration)

The 9949 is a related CVR designation in the 98/99 series that uses the same latch kits and rod hardware as the 9947 in many configurations. Both the 9947 and 9949 share the same baseplate assembly and many center case components. Consult the parts manual for your specific device designation to confirm which components are shared.

9950 WDC (Concealed Vertical Cable, Wood Door)

The 9950WDC uses concealed vertical cables rather than rods in wood door concealed applications. The cable transmission system differs from the rod system used in the 9947WDC. Do not order 9947 rod kits for a 9950WDC device.

For the complete 98/99 series parts overview including rim and surface vertical rod configurations, see the Von Duprin 98/99 Series exit device parts guide. For a device-type comparison covering CVR, SVR, and rim configurations across the full Von Duprin catalog, see the commercial exit device parts guide.

Where the 9947 CVR Fits in the Von Duprin Exit Device Family

The Von Duprin 98/99 series spans three physical configurations: rim, surface vertical rod (SVR), and concealed vertical rod (CVR). Each serves different door types and architectural requirements.

The rim device mounts on the door face and latches at a single frame-side strike. It is the correct specification for single doors and paired doors with a center mullion. For guidance on rim device parts and configurations, see the rim exit devices guide.

The SVR device uses exposed top and bottom rods on the door face, providing three-point locking on double doors without a center mullion. The SVR rods are visible on the door surface. SVR is specified where concealed rods are not required but three-point locking is still needed.

The CVR device, the 9947, conceals both rods inside the door stile. It is the architectural choice for double doors where surface rod hardware would be visually unacceptable and three-point locking is required. For a side-by-side comparison of all Von Duprin series configurations, see the Von Duprin exit device series comparison. For a broader overview of exit device types and how CVR fits within commercial door hardware systems, see the panic hardware for commercial doors guide.

Why Choose SecurityParts.com for Von Duprin 9947 Parts

SecurityParts.com has supplied commercial door hardware parts since 2001. The Von Duprin catalog at SecurityParts.com covers the complete 98/99 series including the 9947 CVR configuration, with OEM replacement parts and same-day shipping from US warehouses on stocked components.

9947 and 9847 Cross-Referenced

SecurityParts.com documents the 9947 and 9847 as the same physical device with different naming conventions, so locksmiths and facility managers searching either designation find the correct parts without confusion.

Manufacture Date Guidance Included

The pre-order support team at SecurityParts.com can confirm which dogging and end cap parts apply to your specific device across the August 1997 and January 2002 manufacture date thresholds before the order ships. Call 845-935-0301.

Panic vs Fire Parts Clearly Separated

Latch mounting bracket quantities, center case kits, and cover kits for fire devices differ from panic specifications. SecurityParts.com documents these differences so the correct quantity and configuration is ordered the first time.

OEM Parts Only

Every Von Duprin 9947 replacement part stocked at SecurityParts.com is genuine OEM, maintaining UL fire listing integrity on fire-rated CVR devices and ANSI/BHMA Grade 1 compliance on panic devices.

Browse the Von Duprin 98/9947 CVR parts catalog, the 98/99 series parts page, and the complete exit devices catalog at SecurityParts.com. Free shipping on orders $300 and over. Same-day shipping on stocked OEM parts. For parts identification and pre-order configuration support, call 845-935-0301 or visit the SecurityParts.com contact page.

Von Duprin commercial door hardware at SecurityParts.com, OEM replacement parts for the full Von Duprin exit device catalog including 98/99 series, 22 series, 33/35A series, 75 series, and 88 series. Same-day shipping on stocked parts.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Von Duprin, Schlage, LCN, Falcon, and Detex parts since 2001. The technical information in this guide is sourced directly from the official Von Duprin 98/9947 Series Parts Manual, the Von Duprin 98/9947 and 98/9949 Series Exit Devices Parts Manual, and the Von Duprin 98/9947 Concealed Vertical Rod Exit Device Installation Instructions (document 107603). For Von Duprin 9947 CVR parts identification, manufacture date verification, and same-day shipping availability, call 845-935-0301 or visit the SecurityParts.com contact page.

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Master Key System Design Guide: Levels of Keying, Schlage Everest 29, SFIC vs FSIC and Construction Keying Friday, July 31, 2026

A master key system is a hierarchy of keys where lower-level keys (change keys) each open one lock and higher-level keys (master, grand master) open progressively more locks. Standard commercial systems use 2 to 3 levels. Cross keying should be avoided wherever possible because it generates phantom keys and reduces system expansion capacity. Schlage Everest 29 offers three keyway families: R (restricted, tightly controlled), S (non-restricted, freely available), and T (restricted). SFIC (Small Format Interchangeable Core) allows fast rekeying in approximately 10 seconds without disassembling the lock. FSIC (Full Size Interchangeable Core) provides the same fast-rekey benefit in a full-size format specific to Schlage. Construction keying uses temporary cores keyed to a construction master key so all construction personnel can access the building; permanent cores are installed at project completion.

A well-designed master key system gives a building owner or facility manager exactly the access they need and nothing more, at every level from individual occupants up to the facilities director. A poorly designed one creates security vulnerabilities that are invisible until someone is harmed, compromises investigation in a theft or incident, and makes future expansion so difficult that the whole system has to be replaced. The design decisions made before the first cylinder is ordered determine whether the system stays secure for 20 years or creates problems within 5.

Browse Schlage key system products at SecurityParts.com: Schlage commercial hardware and key systems catalog, Schlage ND Series cylindrical locks for master keyed systems, Schlage L Series mortise locks for master keyed systems, and the complete Allegion hardware and key system parts catalog.

2029 Year Schlage Everest 29 patent protection on the undercut key design expires (introduced August 2012)

Cross key = avoid Cross keying generates phantom keys, reduces available differs, and should be avoided in every system design

10 sec Approximate time to rekey a lock with SFIC interchangeable cores using a control key; no disassembly needed

Simpler The simplest key system that meets the facility's access needs is the most secure and the most expandable

The Key Hierarchy: From Change Key to Great Grand Master

Every master key system is built on the same core principle: multiple keys of different access levels can all operate the same lock, but each lower-level key can only operate its own lock. The lock owner carries a change key. The floor supervisor carries a master key that also opens the same lock. The building manager carries a grand master key that opens every lock in the building. Understanding this hierarchy is the foundation of every design decision.

Level 4 (if needed)

Great Grand Master Key (GGM)

Opens all locks in all systems under it. Campus-wide, multi-building, or large complex systems. Reserved for the highest-level facilities authority. Should be strictly limited: typically one or two physical keys in existence.

Level 3

Grand Master Key (GMK)

Opens all locks under all master keys within a building or zone. Issued to building managers, facilities directors, and security directors. In a campus system, each building may have its own grand master key that operates under the great grand master.

Level 2

Master Key (MK)

Opens all change key locks within a defined group or section. Issued to department supervisors, floor managers, or maintenance leads who need access to all doors within their area but not the entire building. Each master key group should correspond to a defined organizational unit.

Optional Sub-Level

Sub-Master Key

Opens a subset of the change keys within a master key group. Used in larger systems where a section supervisor needs more than a change key but less than a full master key. Adds a level within a master group rather than between master groups.

Level 1 (lowest)

Change Key (CK)

Opens only one specific lock or a group of locks keyed alike. The key issued to an individual occupant, employee, or tenant. Losing a change key only compromises the locks that change key operates: rekeying is limited to those specific cylinders. Most keys in circulation in any system are change keys.

The Security Principle Behind Key Hierarchy Design

The security of a master key system is determined by the breadth of access that lost or stolen keys provide. A lost change key compromises one lock. A lost master key compromises an entire group. A lost grand master key compromises the building. This hierarchy means the number of keys at higher levels should be strictly minimized: the fewer grand master keys exist, the less the security consequence of a single key loss. Most well-designed commercial systems should have no more than 2 to 3 physical grand master keys in existence, with controlled issuance records for each.

Cross Keying: Why the Industry Recommends Against It

Cross keying is the deliberate process of combinating a cylinder to operate with two or more key bittings that would not normally be expected to operate it. The classic example: a janitor's key is cross keyed into every restroom on the floor, so the janitor can open all restrooms with one key even though those restrooms are on different sections of the master key system with different change keys.

Why Cross Keying Creates Problems

Every pin stack in a cylinder has a finite number of pin positions. In a standard master keyed cylinder, those positions are used to accommodate the change key bitting and the master key bitting. Cross keying requires the pin stack to also accommodate a third (or fourth) key bitting. This uses additional pin segment positions, which consumes the available differs in the system more rapidly.

The deeper problem is phantom keys. When a cylinder is cross keyed to operate with key A, key B, and master key M, the combination of pin segments required can accidentally create a fourth bitting combination C that was never intentionally cut but can also open the lock. This phantom key may correspond to a key that exists somewhere else in the system, creating an unintended cross-connection that violates the original access control design without anyone's knowledge.

The phantom key problem that no one knows about until the security incident: Phantom keys are unintentional. Neither the system designer nor the cylinder manufacturer knows a phantom key exists until someone discovers that an unexpected key opens an unexpected lock. In a healthcare facility, this could mean a patient room key also opens a medication room. In a school, it could mean a student key opens a teacher's office. Phantom keys are more likely in heavily cross-keyed systems and in systems that have been expanded without careful tracking of the available differs. The only reliable prevention is avoiding cross keying wherever possible and, when it must be used, having the key system designed by an experienced locksmith or manufacturer representative who can track the bitting assignments.

Alternatives to Cross Keying

Rather than cross keying a janitor into every restroom, consider keying all restrooms alike under a shared sub-master key. All restrooms then respond to one change key (the janitor's key) and to all master keys above it. This achieves the same operational result without the security compromise of cross keying, and without using up available differs.

Planning a Master Key System: Expansion Parameters and the Simplicity Rule

The most common master key system design mistake is building the smallest system the building currently needs without planning for expansion. A key system that works perfectly for 50 doors today may run out of available combinations when the facility adds 30 more doors in three years, forcing a complete replacement.

Define Expansion Parameters Before Ordering

Before specifying the first cylinder, define realistic expansion parameters in writing: the maximum number of change keys the system will ever need, the maximum number of master key groups, and the maximum number of levels. These numbers determine which key series and how many pins are required. Over-estimating is better than under-estimating: a system designed for 200 change keys that only uses 80 is fine. A system designed for 80 that needs 200 requires complete replacement.

The Simplicity Rule

The ASSA ABLOY master key system design guide states this directly: the simplest keying systems are often the most secure and will last longer than complicated ones. Every additional level of keying and every cross-keyed cylinder adds combinations to the system, uses up available differs faster, and increases the probability of phantom key generation. A 2-level system with no cross keying serving a 100-door building is more secure and more expandable than a 4-level cross-keyed system serving the same building.

The construction keying exclusion that many designers forget when specifying expansion: Construction cores use a specific set of bitting combinations to key all construction cylinders alike. Those construction bittings occupy a portion of the available differs in the key system. If construction keying is specified and the permanent system is planned to use all available bitting combinations, the construction bittings and the permanent change key bittings may conflict. When defining expansion parameters, exclude the construction keying bitting range from the permanent system's change key assignments to prevent any construction key bitting from accidentally matching a permanent key.

Schlage Everest 29 Keyway Families

Schlage introduced the Everest 29 keyway family in August 2012. The defining characteristic of all Everest 29 keyways is an undercut key design protected by patents until 2029. The undercut creates an additional area on the key blade that must align with a check pin in the cylinder for the key to operate. Keys without the correct undercut profile cannot turn the cylinder even if the pin heights are correct, providing an additional layer of physical security beyond standard pin tumbler bitting.

Family	Restriction Level	Key Duplication	Patent Status	Available Formats	Use Case
Everest 29 R	Restricted	Factory-controlled only; requires ordering authorization at restrictedproduct.allegion.com	Protected until 2029	SFIC, conventional, FSIC (via SL cylinder)	Highest key control requirement: schools, hospitals, government, multi-tenant buildings
Everest 29 S	Non-Restricted	Available from standard distributors; locksmiths can cut keys	Patented but openly available	Conventional, FSIC	Physical security benefit of check pin without administrative key control burden
Everest 29 T	Restricted	Factory-controlled; requires ordering formalities	Protected until 2029	Conventional, FSIC	Restricted key control similar to R family; FSIC format availability

Backward Compatibility with Older Everest Families

Everest 29 R keyways are backward compatible with Everest B keyways. Everest 29 S keyways are backward compatible with Everest C keyways. Everest 29 T keyways are backward compatible with Everest D keyways. This backward compatibility means a facility with existing Everest B or C cylinders can upgrade to Everest 29 cylinders and continue using existing Everest keys during the transition period, without requiring an immediate complete key change. New Everest 29 keys will operate both old Everest and new Everest 29 cylinders.

Primus XP Upgrade Path

The R and T restricted keyway families can be upgraded to Primus XP, which adds a second independent sidebar and finger pin locking mechanism to the cylinder. Primus XP provides both administrative key control (restricted keyway) and physical security (pick and drill resistance tested to UL 437). Primus XP is available in five levels of geographic exclusivity, from regional to national, allowing the facility to ensure no other building within a defined geographic area uses the same key section. Browse Schlage Primus and Everest 29 cylinder products at Security Parts.

Conventional Cylinders vs SFIC vs FSIC: Which Format to Choose

Conventional Cylinder

Key-in-lever, mortise, rim; fixed in housing

The standard cylinder format: the cylinder is fixed in the lock body and cannot be removed without disassembling the lock. Rekeying requires removing the cylinder, disassembling it, changing the pin stack, and reassembling.

Best for: Stable environments where rekeying frequency is low. Lower upfront cost than IC formats. Available for virtually every lock type and function.

Rekeying time: 15 to 30 minutes per cylinder, requires tools and cylinder removal.

SFIC (Small Format IC)

6- and 7-pin; cross-brand compatible

A removable core approximately 3/4 inch diameter. The control key rotates 15 degrees to release the core from the housing. The core can be removed and replaced in approximately 10 seconds without opening the door or removing the lock body.

Best for: High-turnover environments (universities, hotels, hospitals), large campuses where rapid rekeying is operationally critical, and facilities where the benefit of instant rekeying justifies the higher core cost.

Cross-brand compatibility: Schlage SFIC cores fit housings from multiple manufacturers. Best A2-format cores are cross-compatible with Schlage SFIC housings.

Rekeying time: Approximately 10 seconds with control key; no tools needed.

FSIC (Full Size IC)

Schlage-specific; full key system capability

A full-size removable core in the standard cylinder diameter. Like SFIC, it uses a control key to remove the core from the housing without disassembling the lock. Unlike SFIC, FSIC is manufacturer-specific: Schlage FSIC cores fit Schlage FSIC housings but are not cross-compatible with FSIC formats from other manufacturers.

Best for: Facilities already committed to Schlage hardware that want the fast-rekey benefit of interchangeable cores with the full capabilities of a Schlage master key system. The Schlage FSIC enables the complete range of Schlage keying options including Primus and Everest 29 keyways.

Rekeying time: Approximately 10 seconds with control key; no tools needed.

The Schlage Everest 29 SL: Unifying Three Formats Under One Key System

The Schlage Everest 29 SL cylinder solves a specific problem faced by large facilities with a mix of conventional, SFIC, and FSIC hardware: each format historically required its own separate key system. The SL cylinder uses an internal L-pin design that allows it to accept SFIC-format A2 keying (7-pin Everest 29 R keyways) while being housed in either a conventional key-in-lever cylinder or an FSIC format. This allows all three cylinder formats to share a single restricted key system under one set of master key bittings.

The SL cylinder is particularly valuable for campuses or large facilities that have accumulated a mix of cylinder formats over time and need to bring them all under a single restricted key system without replacing all installed lock hardware. Browse Schlage Everest 29 SL cylinder and key system products at SecurityParts.

Construction Keying: How Temporary Access Works During Building Projects

Construction keying is the standard practice for controlling access during new construction and major renovation projects. It allows construction personnel to use a single construction master key for all doors during the project without compromising the permanent key system.

Construction cores installed at hardware delivery

All locks in the project are delivered with construction cores installed. These cores are all keyed to the same construction master key bitting, so all workers can access all areas with one construction key.

Construction master keys issued to authorized workers

General contractor, subcontractors, and inspectors receive construction keys. Because all construction cores are keyed alike, a single key type provides access to the entire project. Key control is managed by the general contractor during the project.

Substantial completion: permanent cores installed

At substantial completion and transfer of ownership, the permanent operating cores (configured with the permanent master key system: change keys, master keys, grand master keys) are installed in place of the construction cores. The permanent key system is delivered to the building owner at this time.

Construction cores disposed of or returned

Disposable construction cores are destroyed after removal. Refundable construction cores are returned to the manufacturer or distributor for credit toward future orders. All construction keys should be collected and destroyed at this stage: any outstanding construction keys can no longer access the building once permanent cores are installed.

The construction keying bitting exclusion that prevents accidental key conflicts: Construction cores are keyed to specific bitting combinations that remain consistent across the construction industry within a manufacturer's key system. If those bitting combinations are not explicitly excluded from the permanent key system's change key assignments, the permanent key system designer may accidentally assign a permanent change key the same bitting as the construction key. This would mean a permanent employee's change key also opens the construction core in any lock where the permanent core was not installed or where a construction core was accidentally left in place. Always request that the key system designer explicitly exclude construction key bittings from the permanent system's change key range.

Key Control: Administrative Practices That Maintain System Integrity

Key Record and Issuance Log

Every key issued in a master key system should be logged with the recipient's name, date, key number, and level. Keys should be numbered with unique serial or identification numbers that cannot be removed or obliterated without visible damage. Signed receipts for each key create accountability. The log should identify which bitting each key number corresponds to, so the security consequence of a lost key can be immediately assessed.

Lost Key Protocol

When a key is lost, the response should be proportional to the key's level. A lost change key requires rekeying only the locks that change key opens. A lost master key requires rekeying all change key locks in that master key group. A lost grand master key requires rekeying all locks in the building. The key issuance log is the document that makes this assessment possible: without it, the scope of required rekeying cannot be determined with confidence.

Restricted Keyway Ordering Authorization

For restricted keyway systems (Schlage Everest 29 R or T families), additional key cutting or cylinder orders require authorization through Allegion's restricted product ordering portal at restrictedproduct.allegion.com. Maintaining an active authorized purchaser account in this system ensures that only the facility's authorized representative can order additional keys or cylinders in the restricted keyway. If the facility changes ownership or the authorized contact leaves, updating the authorization record promptly is essential to maintaining key control.

For key system ordering and cylinder parts support at SecurityParts.com, browse Schlage ND Series cylinders and key system components and Schlage L Series mortise lock cylinders. Contact the SecurityParts.com team at 845-935-0301 or the SecurityParts.com contact page for key system specification support.

Why Choose Security Parts for Schlage Key System Parts

Phantom key generation from cross keying documented, construction bitting exclusion requirement, Everest 29 backward compatibility detail, SL unified system concept, and same-day OEM shipping.

Phantom Key Documentation

We document the phantom key generation mechanism from cross keying and why phantom keys create unintended security connections that are invisible until a security incident occurs. This is absent from all competitor parts and key system content.

Construction Bitting Exclusion

We document the construction keying bitting conflict risk: if construction key bittings are not excluded from permanent system change key assignments, permanent employees may accidentally receive keys that also open construction cores. This is not documented by any competitor.

Everest 29 Backward Compatibility

We document the specific backward compatibility mapping (Everest 29 R to Everest B, S to C, T to D), enabling facilities to transition to Everest 29 gradually without immediate complete key change.

Same-Day OEM Shipping

Schlage Everest 29 cylinders, SFIC, and FSIC cores ship same day from US warehouses. Call 845-935-0301 or the contact page for key system specification support.

What Makes Security Parts Different for Key System Parts

We document the phantom key generation mechanism from cross keying. When a cylinder is cross keyed to multiple bittings, the additional pin segments can create accidental bitting combinations that open the lock unexpectedly. This security risk is mentioned by competitors but the mechanism is never explained. Understanding phantom keys prevents them during system design.
We document the construction keying bitting exclusion requirement. If construction key bittings are not excluded from the permanent system's change key range, a permanent change key may accidentally share a bitting with the construction master. This is a design-stage error that has zero visible consequence until a conflict is discovered.
We document the specific Everest 29 backward compatibility mapping by family (R to B, S to C, T to D), enabling phased transition from existing Everest installations to Everest 29 without complete key change. No competitor documents the family-to-family mapping explicitly.
We document the Everest 29 SL unified key system concept: a single restricted key system operating conventional, SFIC, and FSIC cylinder formats simultaneously using one set of master key bittings. This is the most complex Schlage key system feature and is not documented at the parts ordering level by any competitor.
We carry Schlage Everest 29 cylinders and key systems, Schlage ND Series lock cylinders, and Schlage L Series mortise lock cylinders for complete key system implementations from an authorized Allegion distributor.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Master Key System Design

What are the levels of keying in a commercial master key system?

Level 1 (lowest) is the change key: opens only one lock or group of keyed-alike locks. Level 2 is the master key: opens all change key locks in a defined group. Level 3 is the grand master key: opens all master key groups in a building or zone. Level 4 (for large campuses) is the great grand master key: opens all grand master key groups across multiple buildings. Most commercial buildings use 2 to 3 levels. Adding more levels uses up available combinations faster and should only be done when the organizational structure genuinely requires it.

What is cross keying and why does it reduce master key system security?

Cross keying combinating a cylinder to operate with two or more different key bittings beyond its normal change key and master key. This uses additional pin segment positions, consumes available differs faster, and generates phantom keys: accidental bitting combinations that can open the lock when they were never intended to. Phantom keys create unintended security connections that are invisible until discovered in a security incident. Cross keying should be avoided wherever possible; keying similar doors alike under a sub-master key achieves the same operational convenience without the security compromise.

What is the difference between Schlage Everest 29 R, S, and T keyway families?

All three share the Everest 29 patent-protected undercut key design (protected until 2029). R (restricted): key distribution and duplication tightly controlled, requires ordering authorization from Allegion; highest administrative key control. S (non-restricted): patented but available from standard distributors; locksmiths can cut keys; check pin physical security without administrative restriction. T (restricted): similar administrative control to R family. R and T can both be upgraded to Primus XP for additional physical security. R, S, and T are backward compatible with existing Everest B, C, and D keyway families respectively.

What is the difference between SFIC and FSIC interchangeable cores?

SFIC (Small Format Interchangeable Core) is the industry-standard approximately 3/4-inch diameter removable core compatible with multiple manufacturers. Schlage SFIC is available in 6- and 7-pin lengths and is compatible with Best A2 housings. FSIC (Full Size Interchangeable Core) is a full-diameter removable core that is manufacturer-specific: Schlage FSIC cores fit Schlage FSIC housings but not competitor formats. Both rekey in approximately 10 seconds with a control key. SFIC is the choice when cross-brand compatibility matters; FSIC is the choice for maximum Schlage key system capability in a removable core.

What is construction keying and how does it work?

Construction keying uses temporary cores keyed to a single construction master key, giving all construction personnel access to all areas during the project without deploying the permanent key system. At substantial completion, the construction cores are replaced with permanent operating cores and the permanent key system is issued to the owner. Disposable construction cores are destroyed; refundable cores go back to the manufacturer for credit. All construction keys should be collected at ownership transfer since they can no longer access the building after permanent core installation.

What is the Schlage Everest 29 SL cylinder and when is it used?

The SL cylinder uses an L-pin design that accepts SFIC A2 7-pin keying in either a conventional key-in-lever or FSIC cylinder format. This allows three cylinder formats (conventional, SFIC, and FSIC) to share a single restricted Everest 29 R key system. It is used primarily to unify facilities that have a historical mix of cylinder formats under one restricted key system without replacing all installed lock hardware, and for campuses that need some doors as standard cylinders and others as SFIC for rapid rekeying, all on the same master key.

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Schlage 46929063 4AA Battery Holder Kit: Complete Guide for AD and CO Series Locks Friday, July 31, 2026

Part number 46929063 is the Schlage OEM 4AA Battery Holder Kit for the AD Series and CO Series electronic lock families. If your Schlage AD-200, AD-250, AD-400, or CO Series lock is showing a low battery warning, the batteries have failed completely, or the battery holder assembly itself has become damaged, this guide gives you everything you need: what the 46929063 kit includes, every compatible lock model, how to read the low battery indicators, the correct replacement process pulled directly from Schlage's official documentation, battery failure modes, maintenance intervals, and where to order the genuine OEM part.

Browse the Schlage 46929063 4AA Battery Holder Kit at SecurityParts.com. Same-day shipping on stocked quantities.

What Is Part Number 46929063

Part number 46929063 is the official Schlage OEM designation for the 4AA Battery Holder Kit used in compatible Schlage AD Series and CO Series electronic locks. It is Item 15 in the official Schlage AD Series Service Manual (document 106502) and is the correct factory-replacement interior battery assembly for these lock families.

This is not a generic or aftermarket component. It is a genuine Schlage part manufactured to the exact tolerances and connector specifications required for the AD and CO Series interior escutcheon. Using a non-OEM battery holder in a Grade 1 commercial electronic lock risks improper fit, unreliable electrical contact with the interior main board, and potential voiding of the lock warranty and UL listing compliance.

What the 46929063 Kit Includes

This kit ships with three components as listed in the official service manual:

4AA Battery Holder with Cable, the main plastic housing that holds four AA batteries and connects to the interior main board via an integrated cable harness with a factory connector
4AA Battery Strap, a securing strap that holds the battery holder firmly in place inside the interior escutcheon during door operation, vibration, and thermal cycling
Battery Holder Screws (2), two screws used to mount and secure the strap and holder assembly to the interior escutcheon

Batteries are not included. The 46929063 requires four standard AA alkaline batteries, purchased separately. The official Schlage user guides for the AD-200, AD-250, and AD-400 specify alkaline batteries only. Do not use lithium or rechargeable NiMH batteries, the voltage profiles of these battery types cause irregular low-battery detection readings in the AD and CO Series lock electronics.

For ULC-S319 compliant installations, the official Schlage documentation specifies the following AA alkaline battery models: Duracell PC1500 or MN1500, Energizer E91, EN91, AX91, or XR91, and Rayovac 815 or 815-HE.

Schlage 46929063 4AA Battery Holder Kit. OEM replacement for Schlage AD and CO Series electronic locks. Includes battery holder with cable, battery strap, and two mounting screws. In stock at SecurityParts.com.

Schlage AD Series and CO Series Compatibility

The 46929063 fits both the 4AA battery configuration of the Schlage AD Series and compatible CO Series electronic locks. Verify your lock's battery configuration before ordering, not all AD and CO Series models use the 4AA layout. Some use an 8AA holder instead.

AD-200 and AD-250 Series Compatibility

This battery holder is used in the interior of the following AD-200 and AD-250 configurations, as confirmed in the Schlage AD Series Service Manual:

AD-200/250 cylindrical locks, interior portion of the lock body
AD-200/250 mortise locks, interior of the mortise lock assembly
AD-200 mortise deadbolt, interior of the mortise deadbolt
AD-200/250-993-R, S, M, exit trim configurations using the AD-200/250 interior assembly

AD-400 Series Compatibility

This kit is also used in the following AD-400 networked wireless lock configurations:

AD-400 cylindrical locks, interior battery assembly
AD-400-MS, mortise lock configuration
AD-400-MD, mortise deadbolt configuration
AD-400-993-R, S, M, exit trim configurations using the AD-400 interior
AD-400-993 Series, 993 series networked variants

CO Series Compatibility

Compatible CO Series electronic locks use the same interior battery assembly platform as the AD Series, and 46929063 is listed in CO Series service documentation. Confirm your specific CO Series model against the official service manual before ordering to verify the 4AA battery configuration applies to your unit.

AD Series Technical Certifications

The Schlage AD Series locks that use this battery holder are certified to ANSI/BHMA A156.25 Grade 1, UL 294, UL 10C, FCC Part 15, ADA, and RoHS. Maintaining OEM battery holder components is part of preserving compliance with these certifications. The maximum current requirement for the AD Series is up to 250 mA, and the interior operating temperature range, where the 46929063 operates, is 32°F to 120°F (0°C to 49°C).

4AA vs 8AA: Confirming the Right Battery Holder for Your Lock

The AD Series and CO Series are available in two battery configurations. The 46929063 covers the 4AA configuration. The Schlage 46929097 is the separate 8AA battery holder kit for models that use eight AA batteries. These two kits are not interchangeable.

To identify which configuration your lock uses, remove the interior assembly and examine the existing battery holder. It will clearly show whether it holds four or eight batteries. You can also identify the configuration from your lock's model number suffix or by referencing the Schlage AD Series Service Manual against your specific function and trim code.

Schlage 46929097 8AA Battery Holder Kit, the 8AA alternative for AD and CO Series configurations that use eight batteries. Order 46929097 only if your lock uses eight AA batteries. Both kits stocked at SecurityParts.com.

How to Read the Low Battery Warning on Schlage AD Series Locks

One of the most important gaps in every current page ranking for 46929063 is the complete absence of low battery indicator guidance. The official Schlage AD-200 and AD-400 User Guides document this precisely. Understanding the warning signs allows facilities staff to order the 46929063 and replacement batteries before a complete power failure occurs.

AD-200 and AD-250 Low Battery Indicators

On the Schlage AD-200 and AD-250 offline locks, the low battery condition is indicated as follows, per the official Schlage AD-200 Offline Lock User Guide:

Low battery warning (AA batteries): After a credential is presented, the left Schlage button produces 9 red blinks, then the normal access indicator follows
Low battery warning (coin cell): After a credential is presented, the right Schlage button produces 9 red blinks
Battery failure: No LED or beep response. Valid credentials do not grant access. The mechanical override key must be used to unlock the door until batteries are replaced
Beeper behavior: During a low battery condition, the reader beeper is temporarily disabled. It returns to normal function once batteries are replaced
Operating window after low battery warning: The lock is intended to operate for approximately 500 credential cycles in low battery condition before complete failure

Important: If your lock shows no LED and no beep, and valid credentials are not granting access, the batteries have likely reached complete failure, not just low battery. Replace the batteries immediately and use the mechanical override key for access in the interim.

AD-400 Networked Lock Low Battery Indicators

On the Schlage AD-400 networked wireless locks, the low battery behavior differs from the offline AD-200/250 series, per the official Schlage AD-400 User Guide:

Low battery warning: Approximately one month before the end of battery life, the lock sends a Low Battery Trouble signal to the PIM400 access control panel, which in turn sends a Trouble signal to the access control system, typically generating an alert at the head-end software
SUS communication failure in low battery: When a low battery condition is present, the lock may not have sufficient power to communicate with the Setup Utility Software (SUS). If the Schlage button lights solid red for one second when SUS communication is initiated, the battery level is too low to support communication, replace batteries immediately
Battery failure: No LED or beep response. Valid credentials do not grant access. Mechanical override key required

Key difference: The AD-400's networked connection means the access control panel receives the battery alert automatically, approximately one month in advance. Facilities managing AD-400 locks through a central access control system should ensure the panel is configured to forward Low Battery Trouble signals to maintenance staff.

Battery Failure Modes: What Happens When the Battery Dies Completely

Both the AD-200/250 and AD-400 series allow the battery failure mode to be configured via the Setup Utility Software (SUS). The official Schlage documentation defines three modes:

Fail As-Is (default): The lock remains in its current state, locked or unlocked, until batteries are replaced. This is the factory default for both series
Fail Unlocked: The lock unlocks and remains unlocked until batteries are replaced. Use with caution on security-critical openings. Not available when the lock is externally powered
Fail Locked: The lock locks and remains locked until batteries are replaced. Not available when the lock is externally powered

Knowing the configured failure mode for each AD or CO Series lock in your facility is essential for emergency planning. If a lock fails in an unexpected state, the first action is to use the mechanical override cylinder, not to assume the lock is defective.

For a broader understanding of how battery-powered electronic locks integrate with access control systems, see the access control and commercial door hardware integration guide.

Schlage 46929063 Battery Replacement: Step-by-Step Process

The following steps reflect the battery replacement procedure documented in the official Schlage AD-200, AD-250, and AD-400 User Guides. Always consult the official documentation for your specific model and configuration before beginning service work.

Tools and Materials Required

Four fresh AA alkaline batteries (alkaline only, not lithium, not rechargeable)
Phillips head screwdriver
Torx T10 driver (required on some AD Series interior trim screws)
Clean dry cloth
Replacement Schlage 46929063 kit if the holder assembly itself needs replacement

Step 1: Present a Valid Credential First

Before removing the interior assembly, present a valid credential to confirm the lock is in a known operational state. This is particularly important if the batteries are in a low, but not failed, condition, as the lock should still respond. Knowing the current state prevents unexpected lockouts during servicing.

Step 2: Remove the Battery Cover

Remove the battery cover from the interior escutcheon. On most AD Series configurations, the cover is secured by a single screw. Keep the screw and cover together, they are not included in the 46929063 replacement kit. The battery cover is a separate part (Schlage part 4C for the 4AA cover).

Step 3: Remove the Battery Bracket

Remove the battery bracket (strap) by unscrewing the two securing screws. The official Schlage guidance specifies one critical precaution here: do not allow the battery pack to hang from the wires. Support the battery holder as you remove the strap to prevent stress on the cable connector at the interior main board.

Step 4: Disconnect the Cable Connector

With the bracket removed and the holder supported, locate the cable connector running from the battery holder to the interior main board. Press the connector release tab and pull the connector straight out from the board. Always pull on the connector body, not on the cable wires, pulling on the wires can damage the harness and create an intermittent connection that is difficult to diagnose later.

Step 5: Install Fresh Batteries or the Replacement Kit

If you are replacing only the batteries: remove the four AA batteries from the holder, note the polarity markings inside the holder, and install four fresh AA alkaline batteries with the correct orientation. Incorrect orientation is one of the most common causes of failed battery replacement, the lock will not power up if even one battery is reversed.

If you are installing a replacement battery holder kit: transfer four fresh AA alkaline batteries into the new holder using the correct polarity orientation, then proceed with reassembly using the new strap and screws from the kit.

Caution from official Schlage documentation: There is a danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type. Dispose of used batteries according to the manufacturer's instructions.

Step 6: Reconnect and Reinstall

Reconnect the battery cable to the interior main board connector until it clicks into place. Position the battery holder correctly inside the escutcheon, reinstall the battery strap over the holder, and tighten the two screws. Reinstall the battery cover, taking care not to pinch the battery wires between the cover and the escutcheon body when the cover is seated, the official Schlage guidance specifically warns against this, as pinched wires cause intermittent power faults that can be misdiagnosed as battery or main board failures.

Step 7: Test the Lock

Present a valid credential to verify the lock responds correctly. On the AD-200/250, expect a normal LED and audible indicator. On the AD-400, verify the lock communicates with the access control panel and no Low Battery Trouble signal is present. If the lock does not respond after battery replacement, the most common cause is the cable connector not being fully seated, disconnect and reconnect it before concluding the part has failed.

Note from Schlage's official documentation: Replacement of batteries does not affect any programmed data. Credential assignments, access schedules, and lock configuration are stored in non-volatile memory and are not lost during battery replacement.

Battery Maintenance for Schlage AD and CO Series Locks

Use Alkaline Batteries Only

Schlage specifies alkaline AA batteries exclusively for the AD and CO Series. The reason is voltage profile consistency: alkaline batteries maintain a more predictable discharge curve than lithium or NiMH alternatives. Lithium batteries operate at a slightly higher voltage that can skew the lock's battery level readings. Rechargeable NiMH batteries operate at 1.2V instead of the 1.5V of alkaline cells, which causes the lock's electronics to interpret them as partially discharged from the moment they are installed, triggering premature low battery warnings.

Replace All Four Batteries at the Same Time

Replace all four AA batteries in the 46929063 holder simultaneously. Mixing batteries of different ages, even partially used batteries from the same brand, causes uneven drain and shortens the effective service life of the new cells. A mismatched set also produces inconsistent voltage readings that can trigger false low battery conditions.

Establish a Preventive Maintenance Schedule

For high-traffic access control openings, check battery status every six months. For standard commercial openings with moderate credential traffic, annual replacement is a common starting interval. Adjust the schedule based on how frequently low battery warnings appear, repeated early warnings indicate higher-than-expected credential traffic or a temperature-related drain issue.

For facilities running AD-400 networked locks through a central access control panel, use the Low Battery Trouble signal as your scheduling trigger. The signal appears approximately one month before expected battery failure, enough lead time to schedule replacement without emergency urgency. For a complete preventive maintenance framework covering all commercial door hardware, see the commercial door hardware maintenance checklist.

Inspect the Holder Assembly During Every Battery Change

Every time batteries are replaced, briefly inspect the holder assembly for battery contact corrosion, cable connector damage, strap wear, or housing cracks. Catching early deterioration during a planned battery change costs a few minutes. An emergency holder replacement after complete lock failure can take a lock out of service for hours. If any damage is found, order a replacement 4AA Battery Holder Kit from SecurityParts.com for the next scheduled service visit.

Keep Spare Kits On-Site for Large Facilities

Facilities managing ten or more Schlage AD or CO Series locks benefit from keeping one or two spare battery holder kits on hand. When a holder assembly fails unexpectedly, an on-site spare allows same-day restoration without waiting for shipping. This practice is especially important for healthcare facilities, government buildings, and educational institutions where electronic lock downtime on a critical opening is not operationally acceptable.

Other Schlage AD and CO Series Parts at SecurityParts.com

SecurityParts.com stocks a complete range of OEM Schlage AD Series and CO Series service replacement parts. All part pages listed below are confirmed live at SecurityParts.com.

Schlage 46929097, 8AA Battery Holder Kit, the 8AA configuration battery holder for AD and CO Series locks using eight AA batteries
Schlage 46929048, Interior Main Board, the interior electronics assembly responsible for credential processing and lock control
Schlage 46929121, Door Position Switch, the door status monitoring switch reporting open and closed status to the access control panel
Schlage 46929139, REX Switch, Leaf Spring and Screws, the request-to-exit switch assembly for configurations requiring inside egress monitoring
Schlage 46929303, Tailpiece Kit, tailpiece components for AD and CO Series mortise and cylindrical configurations

Browse the complete Schlage hardware parts range at the Schlage commercial hardware catalog. For guidance on OEM vs aftermarket parts for commercial electronic locks, see the OEM vs aftermarket commercial door hardware guide. For a broader look at Schlage cylindrical and electronic lock parts, see the cylindrical lock parts guide and the Schlage commercial lock parts guide.

Schlage commercial hardware parts at SecurityParts.com, OEM replacement parts for AD Series, CO Series, L-Series, ND Series, and ALX Series electronic and mechanical locks. In stock with same-day shipping.

Why Choose SecurityParts.com for Schlage 46929063

SecurityParts.com has stocked genuine OEM Schlage commercial hardware since 2001. Every part shipped is a factory-genuine replacement.

OEM Only, No Aftermarket Substitutes

Every kit stocked at SecurityParts.com is genuine Schlage OEM. Non-OEM battery holders may not fit precisely within the AD or CO Series interior escutcheon, may use lower-quality battery contacts that cause intermittent power connections, and may not include all three kit components. OEM compliance matters particularly for facilities operating under warranty, UL compliance requirements, or service contracts specifying genuine manufacturer parts.

Same-Day Shipping on Stocked Parts

This part is stocked and available for same-day shipping from US warehouses on stocked quantities. For time-sensitive lock service, same-day dispatch reduces the window a critical opening is without full electronic access control function.

Full AD and CO Series Parts Coverage

SecurityParts.com stocks the complete range of AD Series and CO Series service replacement parts from battery holders through main boards, REX switches, door position switches, tailpiece kits, and interior baseplate assemblies. A single order can cover all parts identified during a scheduled service visit. Browse the complete commercial door hardware parts catalog at SecurityParts.com.

Order the Schlage 46929063 4AA Battery Holder Kit at SecurityParts.com. For specification questions, call 845-935-0301 or visit the contact page.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of genuine OEM Schlage, Von Duprin, LCN, Falcon, and Detex parts since 2001. The technical information in this guide is drawn directly from the official Schlage AD Series Service Manual (document 106502), the Schlage AD-200 Offline Lock User Guide (document 102107), the Schlage AD-250 Offline Lock User Guide (document 102108), and the Schlage AD-400 and AD-402 Networked Wireless Lock User Guide (document 104387). For 46929063 availability and same-day shipping, call 845-935-0301 or visit SecurityParts.com.

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Commercial Door Closer Sizing Guide: LCN Sizes 1-6, Mounting Types, ADA and Backcheck Explained Thursday, July 30, 2026

Door closer size numbers (1 through 6) indicate spring power, not physical dimensions. Higher numbers mean stronger spring tension for heavier or wider doors. The LCN 4040XP ships at size 3 and is field-adjustable from size 1 through 6 using the green dial. For standard interior doors (34 to 36 inches), size 3 is the starting point. For standard exterior entries (36 inch, moderate wind), size 3 to 4. For wide heavy exteriors in high wind (42 to 48 inch), size 5 to 6. Critical sizing rule: parallel arm mounting is approximately 25 percent less mechanically efficient than regular arm. Always specify one size higher for parallel arm on exterior doors. ADA requires no more than 5 pounds of opening force on interior accessible routes: verify with a calibrated gauge after final adjustment. The LCN 4040XP carries a 30-year mechanical warranty and replaces the older 4041 Series using the same mounting hole pattern.

Door closer sizing is the specification decision that generates the most field callbacks on new commercial installations. The two most common outcomes of getting it wrong: a door that does not fully close and latch (under-powered closer for the door or the environment), or a door that is too hard to open for ADA compliance (over-powered closer on an interior accessible route). Neither failure is visible at rough-in. Both show up after occupancy when correcting the problem means ordering new parts and sending a technician back.

Browse LCN door closer parts at SecurityParts.com: LCN 4040XP, 4000 Series, 1000 Series, and Sentronic parts, complete LCN door closer parts catalog, LCN 4040XP parts guide by series, and the complete Allegion hardware and parts catalog.

25% Mechanical efficiency reduction of parallel arm vs regular arm at the same spring size setting

Size 3 LCN 4040XP ships from factory adjusted to size 3; field-adjustable 1-6 without removal or special tools

5 lbs ADA maximum opening force on interior doors on accessible routes; verify with calibrated gauge after setting

30 years LCN 4040XP limited mechanical warranty; longest warranty in the LCN closer lineup

What Door Closer Size Numbers Actually Mean

The number on a door closer does not describe the physical size of the unit. Most Grade 1 commercial door closers from LCN, Norton, Sargent, and similar manufacturers are physically comparable in body length (the LCN 4040XP body is approximately 10 inches long regardless of size setting). The size number describes the spring power: the tension stored in the internal spring mechanism that drives the door closed.

A higher size number produces more closing force throughout the door's closing arc. This greater force is needed on wider doors (more leverage required to overcome the door's weight and inertia at the pivot point) and on exterior doors exposed to wind pressure that resists closing. A size 1 closer on a 48-inch exterior hollow metal door in a wind-exposed location will not reliably close and latch the door. A size 6 closer on a 30-inch interior office door will produce an opening force that fails ADA requirements and creates an accessibility barrier for mobility-impaired users.

The LCN 4040XP Green Dial: Visual Spring Size Adjustment

The LCN 4040XP includes a patented green dial indicator at the end of the closer body that provides a visual reference for the current spring size setting. Unlike older closers where size adjustment required counting turns of an unmarked spring adjustment nut, the 4040XP's dial shows the size number clearly. Adjustment is made with a standard box wrench on the spring adjustment nut; the green dial rotates to show the current size without requiring the closer to be removed or the body to be opened. The closer ships from the factory set to size 3.

1Lightest

Very lightweight interior doors, 24 to 30 inches wide. Low-resistance opening required for ADA-sensitive applications with light doors.

2Light

Light interior doors, 30 to 34 inches wide. Interior office doors and light residential-adjacent commercial applications.

3Standard

Standard commercial interior doors, 34 to 36 inches wide. Factory default setting on LCN 4040XP. Most common specification for interior corridor doors.

4Heavy

Standard exterior entry doors, 36 to 42 inches. Interior doors with weatherstripping drag or heavy door construction. Parallel arm on 36-inch exterior.

5Extra Heavy

Wide exterior doors, 42 to 48 inches, or standard exterior in high-wind exposure. Parallel arm on 42-inch exterior. Heavy hollow metal with extensive weatherstripping.

6Maximum

Widest exterior doors, 48 inches or larger. Maximum wind-exposure exterior. Oversized institutional doors. Parallel arm on wide exterior in high wind.

Door Closer Sizing Table: Spring Size by Door Width and Application

Application	Door Width	Regular Arm Size	Parallel Arm Size	Notes
Light interior office or storage	24 to 30 in	1-2	2-3	Low ADA opening force priority
Standard interior corridor	30 to 34 in	2-3	3-4	Most common interior specification
Standard interior commercial	34 to 36 in	3	4	LCN 4040XP factory default setting
Exterior entry, low wind exposure	36 in	3-4	4-5	Weatherstripping adds resistance
Exterior entry, moderate wind	36 to 42 in	4-5	5-6	Verify ADA compliance on accessible sides
Wide exterior or high wind	42 to 48 in	5-6	6	Consider heavier-duty LCN 4040XP EDA arm
Fire door, interior corridor	34 to 36 in	3-4	4-5	Must latch from any open angle; UL 10C required
Fire door, stairwell (wider)	36 to 42 in	4-5	5-6	Higher spring power for reliable latching

Why the table is a starting point, not a guarantee: These recommendations assume a standard door with normal hinge friction, no weatherstripping, and no threshold drag. Every additional resistance source (compression weatherstripping, high-pile carpet threshold, stiff threshold seal, heavy door weight above standard) increases the required spring size independent of door width. Always field-test the final installed closer under actual conditions by releasing the door from full open and confirming it closes and positively latches without assistance. If it does not, increase spring size. If the ADA opening force gauge reads over 5 pounds on an accessible interior route, decrease spring size.

The Three LCN 4040XP Mounting Configurations

Regular Arm (Pull Side)

Hinge side mounting; highest efficiency

Closer body mounts on the hinge side (pull side) of the door. The arm extends from the pinion to a shoe on the door frame. This is the highest mechanical efficiency configuration: the arm geometry transmits spring force to the door with the least energy loss throughout the closing arc.

The LCN 4040XP ships tri-packed with hardware for regular arm as the default configuration. Maximum opening with standard template: 120 degrees.

Use when: Pull-side mounting is architecturally acceptable, the door opens away from the approach corridor, and maximum mechanical efficiency is the priority (exterior doors, heavy doors, fire doors).

Parallel Arm (Push Side)

Push side; 25% efficiency reduction vs regular arm

Closer body mounts on the push side of the door. The arm runs parallel to the door face toward the frame. Push-side mounting keeps the closer body away from the corridor approach side, providing better vandalism resistance and a cleaner appearance on the approach side.

This is the dominant specification for school corridors, healthcare corridor doors, and government buildings where vandalism or corridor aesthetics are priorities. The 25 percent efficiency reduction compared to regular arm is the critical specification fact.

Use when: Push-side mounting is required for aesthetics or vandalism resistance. Always specify one size higher than the regular arm table recommendation.

Top Jamb (Push Side)

Frame head mounting; push-side alternative

Closer body mounts on the frame head (top of the door opening). The arm extends from the frame-mounted body down to a shoe on the door face. This is a push-side mounting alternative when parallel arm is not feasible due to door rail height (narrow top rail on aluminum storefront doors), frame conditions, or minimum clearance requirements.

The LCN 4040XP requires a minimum 1-1/4 inch top rail for standard top jamb mounting; 2-1/4 inch with the 4040-18TJ plate; 3 inches with the 4040-18G plate for flush ceiling applications.

Use when: Parallel arm is not feasible and push-side mounting is required.

The parallel arm undersizing error that causes most closer field callbacks on new commercial projects: A contractor specifies size 3 LCN 4040XP in parallel arm on a 36-inch exterior door with weatherstripping, following the regular arm sizing table. After installation, the door does not latch reliably against wind pressure. The correct specification is size 4 for this application: one step higher than the regular arm size 3 recommendation, to compensate for the 25 percent parallel arm efficiency reduction. This error is the single most common LCN closer specification mistake and generates more field callbacks than any other closer selection issue. Before finalizing a parallel arm exterior door specification, apply the +1 size rule.

ADA Opening Force Compliance: More Than a Size Table Decision

ADA and ICC A117.1 require no more than 5 pounds of opening force at the door handle or lever on interior doors on accessible routes. The closer size table provides starting recommendations, but the actual opening force the person in the wheelchair encounters depends on multiple factors beyond spring size:

Door weight: A heavy solid core wood door or thick hollow metal door requires more spring power to close (requiring a larger size) but also requires more force to push open. On ADA-accessible interior routes with heavy doors, the conflict between fire door latching requirements and ADA opening force limits can be difficult to resolve with spring size alone.

Hinge friction: Worn hinge bearings or dry hinge pins increase the resistance to door rotation. This friction adds to the effective opening force without changing the spring setting. Worn hinges on an ADA-accessible door should be replaced before attempting to meet the 5-pound limit by reducing spring size.

Weatherstripping drag: Compression weatherstripping creates significant resistance near the closed position. A door that requires 4 pounds to open from 30 degrees may require 7 or 8 pounds to push open from the fully latched position against compressed weatherstripping. Weatherstripping drag is not reflected in the standard size table.

Threshold resistance: High-pile carpet or stiff threshold seals add opening force that varies with wear. A door that passes the 5-pound ADA test when new may fail after carpet compresses and stiffens over time.

The calibrated force gauge verification step that most contractors skip: After setting the spring size and closing speed on an ADA-accessible door, the only reliable way to confirm ADA compliance is to measure actual opening force with a calibrated push-pull gauge at the door handle height (34 to 48 inches from the floor). The gauge must be pushed steadily (not jerked) to measure the sustained opening force, not the initial breakaway force. A door that reads 4.8 pounds in October may read 7 pounds in January if it is an exterior door and the hydraulic fluid thickens. ADA verification should be conducted at the seasonal conditions where force is highest, not just at installation commissioning.

Closer Valve Adjustments: Sweep Speed, Latch Speed, and Backcheck

Valve	Controls	Clockwise (CW)	Counterclockwise (CCW)	Notes
S (Sweep)	Closing speed from full open to approximately 10-15 degrees from closed	Slower closing (more resistance)	Faster closing (less resistance)	Set first; adjust until door moves at controlled sweep speed
L (Latch)	Final 10-15 degrees of closing arc into latched position	Slower final action	Faster final closing action (helps latching)	Set second; door must latch securely without slamming
BC (Backcheck)	Resistance when door is opened rapidly past approximately 70-75 degrees	Stronger backcheck (more resistance)	Lighter backcheck	Set last; prevents door from slamming open against stop

Correct Valve Adjustment Sequence

Adjust in order: sweep speed first, then latch speed, then backcheck. Adjusting out of sequence wastes time because each valve affects the next. After each adjustment, cycle the door at least 10 times to allow the hydraulic fluid to redistribute before evaluating the result. Hydraulic fluid takes several cycles to reach a stable distribution state after a valve adjustment.

Backcheck: Why It Is Essential on Exterior Doors

Backcheck is a hydraulic resistance function that cushions the door against rapid opening impacts beyond approximately 70 to 75 degrees. Without backcheck, a strong wind gust or a person pushing the door open quickly will drive it against the door stop, frame, or adjacent wall at full speed, potentially bending the closer arm, stripping the door spindle, or cracking glazing in the door or adjacent sidelight. Backcheck does not prevent the door from opening fully: it decelerates the door before impact. Engage backcheck on every exterior door installation and any interior door where the swing path has limited stopping clearance.

LCN 4040XP Specifications: Complete Reference

LCN 4040XP Series: Confirmed Technical Specifications

Body construction

Cast iron with full complement bearing

Piston diameter

1-1/2 inch (38 mm)

Pinion construction

Double heat-treated steel

Hydraulic fluid

All-weather Liquid X (temperature stable)

Handing

Non-handed (works on left or right swing doors)

Spring size range

Adjustable 1-6 (shipped at size 3)

Interior door maximum

5 feet (60 inches) wide

Exterior door maximum

4 feet (48 inches) wide

ADA capability

Under 5.0 lbs on 36-inch door when adjusted

Grade

ANSI/BHMA A156.4 Grade 1

Fire door listing

UL and cUL listed under UL 10C

Mechanical warranty

30-year limited

Standard mounting

Tri-pack: regular arm, top jamb, parallel arm

Maximum opening

120 degrees with standard template

4041 Series retrofit

Direct drop-in: same mounting hole pattern

LCN 4040SE Sentronic: Electromagnetic Hold-Open for Fire Doors

The LCN 4040SE Sentronic is the version of the 4040 Series that includes an integrated electromagnetic hold-open coil. The hold-open coil receives 120V power from the building wiring and holds the closer arm in the open position, keeping the door open during normal building operations. When the fire alarm panel activates, it interrupts power to the hold-open coil. The closer spring immediately drives the door to the closed and latched position without any human action.

This is the NFPA 80 Section 6.6.1 compliant hold-open specification for fire-labeled door assemblies. Section 6.6.1 requires that any hold-open device on a fire door be capable of releasing automatically upon fire alarm activation. Standard friction hold-open arms on door closers do not meet this requirement because they require someone to manually push the door closed. The Sentronic's automatic release on alarm activation is what makes it compliant.

The non-compliant hold-open that most commercial buildings have on fire corridor doors: Many buildings have fire-labeled corridor doors being held open with standard friction hold-open arms, door stops, or wedges. None of these release automatically on fire alarm. None comply with NFPA 80 Section 6.6.1. Inspectors cite these every year in NFPA 80 annual inspections. The correct hardware is the LCN 4040SE Sentronic, which integrates with the building's fire alarm system and releases automatically on alarm. Browse LCN 4040SE Sentronic parts and replacement components at SecurityParts.com.

Sentronic specifications: 120V power to the closer body, 10-year mechanical warranty, 2-year electrical warranty. Available in the same arm configurations as the standard 4040XP.

Fire Door Closer Requirements: UL 10C and Positive Pressure

Every LCN 4040XP Series closer carries UL 10C listing, which is the Positive Pressure Fire Testing standard required by NFPA 80 for all hardware on fire-labeled door assemblies. UL 10C tests hardware under the positive pressure conditions of an actual fire: the outward pressure from fire-driven gases pushing against the door assembly. A closer that is only Grade 1 rated without UL 10C listing cannot be legally installed on a fire-rated door assembly regardless of its mechanical performance.

For fire-rated doors, size the closer to ensure positive latching from any open angle. The NFPA 80 inspection test (release from full open, confirm it closes and latches without assistance) is the compliance test. A fire door closer that passes the ADA 5-pound test but fails to latch consistently from full open under all seasonal conditions does not satisfy NFPA 80 requirements. The fire door latching requirement takes precedence over the ADA opening force preference on fire doors.

Browse LCN door closer parts for fire door applications and complete LCN 4040XP replacement parts catalog at SecurityParts.com. Pre-order closer sizing support at 845-935-0301 or the contact page.

Why Choose SecurityParts.com for LCN Door Closer Parts

Parallel arm 25% efficiency documentation, calibrated ADA gauge verification requirement, Sentronic NFPA 80 compliance detail, 4040XP as 4041 direct retrofit, and same-day OEM shipping.

Parallel Arm Efficiency Rule

We document the 25 percent parallel arm efficiency reduction and the specific requirement to size up one step for parallel arm exterior doors. This is the most common LCN closer specification error and is not documented at the parts ordering level by any competitor.

ADA Gauge Verification

We document that the size table provides starting points and that actual ADA compliance requires a calibrated push-pull gauge verification at door handle height under seasonal worst-case conditions, not just at installation commissioning.

Sentronic NFPA 80 Compliance

We document the NFPA 80 Section 6.6.1 requirement for automatic fire alarm release on fire door hold-open devices and why friction hold-open arms do not comply, making the Sentronic the correct specification.

Same-Day OEM Shipping

LCN 4040XP parts ship same day from US warehouses. The 4040XP is a direct 4041 retrofit. Call 845-935-0301 or the contact page for closer sizing support.

What Makes Security Parts Different for LCN Closer Parts and Specification

We document the 25 percent parallel arm mechanical efficiency reduction with the specific sizing rule: add one spring size to every parallel arm exterior door specification. This is the most common LCN closer specification error causing field callbacks and is not documented by any competitor at the parts ordering level.
We document why the size table is a starting point and why ADA compliance requires a calibrated gauge measurement after installation, not reliance on the table alone. Additional resistance sources (weatherstripping, heavy door weight, worn hinges, carpet thresholds) affect opening force independently of spring setting.
We document the NFPA 80 Section 6.6.1 automatic release requirement for fire door hold-open devices and why friction hold-open arms produce a cited NFPA 80 deficiency at every annual inspection. The LCN 4040SE Sentronic with fire alarm panel integration is the only code-compliant hold-open option.
We document the LCN 4040XP as a direct drop-in retrofit for the older LCN 4041 Series using the same mounting hole pattern, making it the automatic first choice for all 4041 replacements in the field without requiring new frame preparation.
All LCN parts at SecurityParts.com are OEM from authorized Allegion distribution, covered under LCN's 30-year mechanical warranty for the 4040XP Series. Browse LCN 4040XP parts, complete door closer parts catalog, and all Allegion parts at SecurityParts.com.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About Commercial Door Closer Sizing

What do door closer size numbers (1 through 6) actually mean?

Size numbers indicate spring power, not physical dimensions. Most Grade 1 commercial closer bodies are approximately the same length regardless of size number. Size 1 is the lightest spring, suitable for very lightweight interior doors. Size 6 is the strongest, required for wide, heavy exterior doors in high-wind locations. The LCN 4040XP ships at size 3 (the most common interior commercial setting) and is field-adjustable from 1 through 6 using the green dial indicator without removing the closer.

Why does parallel arm mounting require a higher closer size than regular arm?

Parallel arm mounting is approximately 25 percent less mechanically efficient than regular arm mounting. The arm geometry in parallel arm reduces the mechanical advantage at the critical final closing arc, delivering less effective closing force at the same spring size. A parallel arm size 3 delivers approximately the same effective force as a regular arm size 2 on the same door. Always specify one spring size higher for parallel arm applications than the regular arm table recommends, especially on exterior doors exposed to wind pressure.

What is the ADA opening force requirement for commercial door closers?

ADA and ICC A117.1 require no more than 5 pounds of opening force at the door handle on interior doors on accessible routes. The size table provides starting points, but actual opening force depends on door weight, hinge friction, weatherstripping drag, and threshold resistance in addition to spring setting. Always verify ADA compliance with a calibrated push-pull gauge at door handle height (34 to 48 inches) after final adjustment. Seasonal temperature changes affect hydraulic fluid viscosity and can increase opening force in cold weather beyond the summer commissioning reading.

What is the backcheck function on a door closer and when should it be used?

Backcheck creates a cushioned hydraulic resistance when the door is pushed open rapidly past approximately 70 to 75 degrees, decelerating the door before it strikes a wall stop. It prevents door-to-wall impact damage, closer arm bending, and spindle strip. The backcheck valve is separate from the sweep and latch valves. Adjust after sweep and latch speeds are set: turn clockwise for stronger backcheck, counterclockwise for lighter. Use backcheck on all exterior doors and any interior door where the swing path has limited stopping distance.

What is the LCN 4040SE Sentronic and how does it comply with NFPA 80?

The Sentronic is an electromagnetic hold-open closer that holds fire doors open during normal operations and releases automatically on fire alarm activation by current interruption to the hold-open coil. This satisfies NFPA 80 Section 6.6.1, which requires any hold-open device on a fire door to release automatically on fire alarm. Friction hold-open arms require manual release and do not comply. The Sentronic carries a 10-year mechanical warranty and 2-year electrical warranty. It is the only code-compliant hold-open specification for fire-labeled corridor doors.

Is the LCN 4040XP a direct replacement for the older LCN 4041 Series?

Yes. The LCN 4040XP uses the same mounting hole pattern as the LCN 4041 Series. It is a direct drop-in replacement for any existing 4041 installation without new frame preparation or drilling. The 4040XP improves on the 4041 with a cast iron body, double heat-treated pinion, Extra Duty Arm option, all-weather Liquid X fluid, green dial spring size indicator, and a 30-year limited mechanical warranty. When replacing a failed 4041 closer, order the 4040XP for a direct hardware-compatible upgrade.

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Schlage L9692EU: Motorized Latch Retraction with Lever Control, Complete Guide Thursday, July 30, 2026

The Schlage L9692EU is a Grade 1 L-Series mortise lock that combines motorized latch retraction with electrified outside lever control. Unlike the L9580, which only retracts the latch on signal, the L9692EU also controls the outside lever electronically, locking or unlocking it based on the access control credential or signal received.

It operates on 24V DC, runs the field-selectable EL (electrically locked, fail safe) or EU (electrically unlocked, fail secure) mode, and is available with RX and LX monitoring options. SecurityParts.com stocks the L9692EU chassis with LX and the L9692EU chassis with RX and LX. Call 845-935-0301 for configuration support before ordering.

Most access control integrators know the Schlage L9692EU by its model number before they know what it actually does. That is a reasonable starting point, model number lookups are how this hardware gets specified in the field, but the model number alone does not tell you whether it is the right function for the opening, how to wire it correctly, or what happens to the lever when the power goes down.

This guide covers all of it: what the L9692EU does and how it differs from latch-only mortise locks, the EL vs EU mode decision, wiring specifications, how the L9692EU compares to the L9695EU and L9696EU functions, RX and LX selection, common install errors, and where to source the replacement chassis. Browse the full Schlage L-Series mortise lock parts catalog at SecurityParts.com.

What the Schlage L9692EU Actually Does

The Schlage L9692EU runs one function that separates it from every other L-Series function: it controls the outside lever electronically while simultaneously providing motorized latch retraction. Those are two distinct electrified operations working in the same chassis.

On a mechanical storeroom lock like the L9080, the outside lever is permanently fixed. The door only opens from outside with a key. On the L9580, motorized latch retraction lets the door release on signal, but the outside lever remains mechanically fixed. The L9692EU adds a third layer: the outside lever itself can be electrically locked or unlocked in addition to latch retraction. When the lever is electrically unlocked, someone can push the lever down and enter without a key. When it is electrically locked, the lever does not move unless a key is used or power state changes.

The inside lever on the L9692EU is always free for egress. This is a life-safety requirement, not an option. Regardless of the power state or mode selected, the inside lever always retracts the latch and allows exit.

For guidance on how this fits into a broader electrified door hardware system, see the access control and commercial door hardware integration guide.

Schlage L9692EU motorized latch retraction chassis with lever control and LX monitor. OEM replacement chassis stocked at SecurityParts.com.

EL Mode vs EU Mode: Which One Does Your Opening Need

The EL and EU designations in the model name refer to the operating mode of the electrified lever, not the latch retraction. Latch retraction behavior is the same in both modes: powered means latch retracted, unpowered means latch extended. The mode only affects what the lever does.

EU Mode, Electrically Unlocked (Fail Secure)

Power applied: Outside lever unlocks, door can be opened by lever without a key
Power removed: Outside lever locks, key required for entry
Power failure: Door locks, access denied until power is restored or a key is used
Use when: The normal state should be locked; a valid credential unlocks the lever for entry
Common applications: Office suites, storerooms, server rooms, access-controlled corridors

EL Mode, Electrically Locked (Fail Safe)

Power applied: Outside lever locks, key required for entry
Power removed: Outside lever unlocks, lever operates freely
Power failure: Door unlocks, anyone can enter from outside
Use when: The normal state should be unlocked; a lockdown signal secures the door
Common applications: Emergency lockdown scenarios, certain ADA-accessible routes

The mode is field-selectable using the mode select switch located on the chassis. Both modes ship in the same physical chassis, the switch sets the behavior.

One critical installation detail: when switching from EU to EL or EL to EU, the lock requires a complete power cycle to synchronize to the new mode. Flip the switch without cycling power and the lock will behave inconsistently until the cycle is completed.

Important, do not share a circuit with solenoid-based devices without transient voltage suppression: Solenoids generate voltage spikes when they de-energize. Those spikes damage the L9692EU motor. Schlage's installation documentation specifies a varistor rated at 35V peak recurrent installed at the solenoid equipment. Omitting this is the leading cause of premature L9692EU motor failure in the first year of service.

Schlage L9692EU vs L9580: Which Function Is Right

The L9580 and L9692EU are the two most commonly specified Schlage motorized latch retraction functions. They are frequently confused during specification because both involve motorized latch retraction and both operate on 24V DC. They do different things.

What the L9580 Does

Retracts the latch on signal
Outside lever remains mechanically fixed at all times
Someone still uses the lever to open the door after the latch retracts
Operating mode is not field-selectable, functionally similar to fail secure
Peak current: 1.4A (latch retraction only)
Best for: signal-release doors, auto operators, infection-control corridors, hands-free entries

What the L9692EU Does

Retracts the latch on signal AND controls the outside lever electronically
Outside lever locks or unlocks based on the EL or EU mode and the access control signal
Someone can push the lever freely when it is electronically unlocked, no key required
Operating mode is field-selectable (EL or EU) using the chassis switch
Peak current: 1.4A (latch) plus 0.4A (lever control)
Best for: access control openings where the lever itself must lock or unlock on credential

The Practical Decision

If the opening needs the door to release on signal and someone still pushes the lever to enter, use the L9580. If the opening needs someone to push the lever down freely on a valid credential, without using a key, use the L9692EU.

Both functions share the same chassis footprint as the mechanical L9000 series, retrofit existing L9000 mortise pockets without frame modification, and are UL listed for 3-hour fire door assemblies.

For a deeper look at the L9580 function, wiring, and applications, see the Schlage L9580 motorized latch retraction guide. For a direct specification comparison between the L9580 and electric strike, see the L9580 vs electric strike guide.

L9692EU vs L9695EU vs L9696EU: Choosing the Right Lever Control Function

The L9692EU is one of three lever-control functions in the Schlage motorized latch retraction family. All three combine motorized latch retraction with electrified lever control, but they differ in which lever or levers are controlled and how the cylinder is configured.

Schlage L-Series mortise locks: the Grade 1 commercial standard covering mechanical and electrified functions including L9692EU. Browse L-Series parts at SecurityParts.com.

L9692EU, Outside Lever Control, Outside Cylinder

The L9692EU controls only the outside lever. The inside lever is always free. Outside access requires a key in the outside cylinder, or the access control system unlocking the lever electronically. This is the standard specification for most commercial access-controlled openings: an employee presents a credential, the lever unlocks, they push the lever and enter.

This function is appropriate for single-point entry control where the goal is to grant or deny outside access while preserving free egress from inside at all times.

L9695EU, Both Levers Controlled, Double Cylinder

The L9695EU controls both the outside and inside levers. It has cylinders on both sides. Both levers lock or unlock simultaneously based on the power state. This function is used in high-security applications where inside access must also be controlled, for example, a secure storage room where both entry and exit require an authorized credential.

Important: Any function that can lock the inside lever must be carefully evaluated for compliance with local egress codes and NFPA 80 requirements. On fire-rated doors and doors in egress paths, locking the inside lever may be prohibited or may require additional life-safety measures. Confirm with the authority having jurisdiction before specifying L9695EU on any fire-rated or egress door.

L9696EU, Inside Lever Control, Double Cylinder

The L9696EU controls only the inside lever. The outside lever is fixed, it does not move. Both sides have cylinders. This function is used in applications where the goal is to lock out authorized inside users without affecting outside key access, certain pharmacy windows, controlled dispensing areas, and similar scenarios where outside staff always have key access but inside personnel should only exit on authorization.

For the correct function in the vast majority of commercial access control applications, the L9692EU is the right specification. For full L-Series parts and function diagrams, see the Schlage L-Series parts diagrams guide.

Wiring the Schlage L9692EU: Specifications and Connection

Electrical Specifications

Input voltage: 24V DC only (21.6V to 28V DC operating range)
Peak current, latch retraction: 1.4 amps
Peak current, lever control: 0.4 amps
Holding current: 0.1 amps (both functions combined)
Operating temperature: 32°F to 120°F (0°C to 49°C)
Maximum relative humidity: 85%
Connector type: Allegion Connect factory-installed Molex connector with quick-connect harnesses

Power Supply Sizing

Size the power supply for simultaneous peak draw across all connected locks. Two L9692EU locks firing simultaneously can draw close to 3.6 amps for latch retraction plus 0.8 amps for lever control at the moment of actuation. A UL 294 certified access control power supply handles this correctly if specified for the full load.

Always account for peak draw, not holding current, when sizing the supply. Undersized power supplies cause intermittent actuation failures that are frequently misdiagnosed as lock defects.

Allegion Connect Wiring

The L9692EU ships with the Allegion Connect factory-installed Molex connector system. This connector provides quick-connect harnesses that pass through electrified hinges or electrical power transfers (EPT) in the door.

As an alternative, the Molex connector can be removed and the lock wired using traditional wire splicing or the included 6-inch wiring harness if additional wire length is needed. Neither method affects lock performance, the connector is a convenience for installation, not a functional component.

Transient voltage suppression is required when sharing a circuit with solenoid devices: If the L9692EU circuit also powers solenoid-based hardware such as electric strikes or electromagnetic locks, install a varistor rated at 35V peak recurrent at every solenoid device on that circuit. The varistor must be installed at the solenoid, not at the lock. This requirement applies to all variants including L9692EU, L9695EU, and L9696EU. Failure to suppress transient voltage from solenoid de-energization is the most common cause of motor failure in the L9692EU within the first year of service.

RX and LX Options on the Schlage L9692EU

RX: Request to Exit

RX is a switch that closes when the inside lever rotates. It signals the access control panel that a valid exit is occurring from inside the secured area. This serves two purposes: it suppresses the forced-entry alarm that would otherwise trigger when the door opens without a credential, and it logs the exit event in the access control system.

RX is the standard monitoring option for L9692EU installations and is appropriate for the vast majority of commercial access control integrations. If the access control panel needs to distinguish between a door opening from inside and a forced-entry event, RX is required.

LX: Latchbolt Monitor

LX signals whether the latchbolt is extended or retracted at any moment. It tells the access control panel whether the door is actually latched, independent of whether the door is closed. This is a higher level of monitoring than a standard door position switch (DPS), which only signals whether the door is open or closed, not whether it is latched.

LX is specified for high-security openings where confirming the door is truly latched, not just physically closed, is a monitoring requirement. Examples include pharmacy dispensing areas, secured IT rooms, and certain government or institutional applications where partial-latch states must be detected and alarmed.

RX and LX can be ordered together on the same chassis. SecurityParts.com stocks both configurations:

Schlage L9692EU motorized latch retraction chassis with RX request-to-exit and LX latchbolt monitor. Stocked at SecurityParts.com with same-day shipping on stocked components.

Common Installation Errors on the Schlage L9692EU

The L9692EU is a precision electromechanical assembly. Most field failures trace back to one of four installation errors rather than a defective unit.

1. Sharing a Circuit with Solenoid Hardware Without Transient Suppression

Solenoid de-energization spikes damage the L9692EU motor. Install a 35V peak-recurrent varistor at every solenoid device on the circuit. This is the single largest cause of premature motor failure in the field and the first thing to check when an L9692EU fails inside the first year of service.

2. Wrong Voltage at the Lock Terminals

The L9692EU requires 24V DC within the 21.6V to 28V DC operating range. A 12V panel will not actuate the lock reliably. AC power damages the motor. Confirm voltage with a multimeter at the lock terminals before declaring the unit defective on a new installation.

3. Switching EL to EU Without a Power Cycle

The mode select switch on the chassis sets EL or EU behavior, but the change does not take effect until the lock completes a full power cycle. Switch the mode, then remove and restore power. A lock that behaves inconsistently after a mode change has almost always not been power-cycled after the switch was moved.

4. Improper Coordination with Exit Devices on the Same Opening

On openings where an L9692EU is installed alongside an exit device, the two must be specified and installed so they operate independently. The exit device must always allow egress regardless of the L9692EU power state. Confirm that the exit device specification and installation do not create a dependency on the L9692EU power state for egress operation.

Call 845-935-0301 before ordering a replacement chassis: If an L9692EU has failed in service, confirm the failure mode before ordering a replacement. A lock that does not actuate on signal is most commonly a power supply, wiring, or solenoid-circuit issue, not a failed chassis. SecurityParts.com provides pre-order technical support to confirm the correct part and configuration before the order ships.

How the L9692EU Fits into the L-Series Electrified Family

Allegion's Schlage L-Series motorized latch retraction line covers six functions across two groups. Understanding where the L9692EU sits in this family helps with specification and sourcing when a project requires multiple electrified functions across different openings.

Latch Retraction Only (No Lever Control)

This group includes the L9510 (passage), L9580 (storeroom), and L9582 (institution). These functions retract the latch on signal but do not electrify the lever. The L9580 is the most commonly specified of the three. For L9580 guidance, see the Schlage L9580 guide.

Latch Retraction with Lever Control (L9692 Family)

This group includes the L9692EL/EU (outside lever only), L9695EL/EU (both levers, double cylinder), and L9696EL/EU (inside lever only, double cylinder). The L9692EU is the standard specification in this group for single-point outside access control.

All six functions share the same chassis dimensions as the mechanical L9000 series, retrofit the existing L9000 mortise pocket without frame modification, and are UL listed for 3-hour fire door assemblies.

For OEM vs aftermarket guidance on electrified mortise lock components, see the OEM vs aftermarket commercial door hardware parts guide. For fire-rated door compliance context, see the commercial door fire rating guide.

Sourcing the L9692EU Replacement Chassis

When sourcing a replacement L9692EU chassis, four specifications must be confirmed before the order ships:

Monitor configuration (LX only, or RX plus LX)
Cylinder format (conventional, FSIC, SFIC, or less cylinder)
Finish
Door thickness (if anything other than the standard 1-3/4 inch)

Handing is field-reversible on the L9692EU chassis and does not need to be specified at order. The mode (EL or EU) is also field-selectable on the chassis switch, specify the function (L9692) and the mode will be set during installation.

For the trim components that mount on the L9692EU chassis, levers, escutcheons, cylinders, see the Schlage L-Series mortise lock parts guide and the Schlage L-Series parts diagrams. For the broader Schlage hardware catalog including L-Series components, see the Schlage commercial hardware parts page.

Browse all Schlage mortise lock parts at the mortise lock parts catalog. For questions on configuration, availability, or specification verification, call 845-935-0301 or visit the SecurityParts.com contact page.

Why Choose SecurityParts.com for Schlage L9692EU Parts

SecurityParts.com has stocked Schlage commercial hardware since 2001. The L9692EU chassis is stocked in both LX and RX plus LX configurations with same-day shipping from US warehouses on stocked components.

Pre-Order Specification Support

Call 845-935-0301 to confirm the correct chassis configuration, monitor option, cylinder format, and finish, before the order ships. This prevents the wrong-configuration return on a project that cannot wait.

OEM Parts Only

Every L9692EU chassis stocked at SecurityParts.com is genuine Schlage OEM. Non-OEM electrified mortise chassis components void the UL listing on fire-rated assemblies and are not appropriate for Grade 1 access control installations.

Complete L-Series Coverage

SecurityParts.com stocks L9692EU chassis components alongside the full range of L-Series trim, cylinders, escutcheons, and mechanical parts for complete single-order sourcing across a facility. Same-day shipping on stocked components from US warehouses.

Browse the L9692EU chassis with LX, the L9692EU chassis with RX and LX, and the complete commercial door hardware parts catalog at SecurityParts.com.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM Schlage, Von Duprin, LCN, Falcon, and Detex parts since 2001. The team provides specification and pre-order configuration support for electrified mortise locks, motorized latch retraction functions, and access control hardware integration across commercial, institutional, healthcare, and government facilities. For L9692EU configuration support and same-day shipping availability, call 845-935-0301.

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Commercial Door Hardware Maintenance Schedule and NFPA 80 Annual Inspection Guide Wednesday, July 29, 2026

NFPA 80 requires annual inspection of all fire door assemblies by a qualified person. The 2022 edition (most widely adopted in current AHJ enforcement) uses a 13-point checklist. Healthcare facilities under CMS jurisdiction enforce the 2010 edition via the 2012 NFPA 101 reference, and fire door deficiencies are cited under K-tag K0223. Industry data shows approximately 76 percent of fire doors fail at least one inspection point. The most common deficiencies: improper door closer adjustment (45 percent of failures), excessive door-to-frame clearances, mechanical dogging of fire exit hardware, and non-listed replacement hardware. Door closer hydraulic fluid thickens in cold temperatures, increasing opening force and creating winter ADA compliance violations on exterior accessible routes that do not exist during warmer months. OEM replacement parts from SecurityParts.com correct the most common deficiency categories before they become inspection citations.

NFPA 80 annual fire door inspection is not a box-checking exercise. It is a documented test of whether each fire door assembly will perform its life safety function in an actual fire event. The 76 percent failure rate from industry inspections means that in a building with 100 fire doors, 76 of them have at least one documented deficiency. Most of those deficiencies are correctable with proper maintenance and OEM parts. This guide covers the complete preventive maintenance schedule for commercial door hardware, the NFPA 80 2022 edition 13-point annual inspection checklist, the most-cited deficiency categories, and the specific parts that address each.

Browse replacement parts for inspection deficiencies at SecurityParts.com: LCN door closer parts for closer adjustment failures, Von Duprin exit device parts for latch and spring deficiencies, Schlage ND Series cylindrical lock parts, Schlage L Series mortise lock parts, and the complete Allegion parts catalog for all inspection-driven replacements.

76% Percentage of fire doors that fail at least one NFPA 80 annual inspection checklist point

13 points NFPA 80 2022 edition inspection checklist items (expanded from 11 in earlier editions)

K0223 CMS K-tag for fire door deficiencies: consistently one of the most-cited Life Safety Code survey findings

45% Estimated proportion of fire door failures caused by improper door closer adjustment alone

Which Edition of NFPA 80 Applies to Your Building

NFPA 80 is updated on a roughly 3-year cycle. Different editions are in force in different jurisdictions, and knowing which edition your AHJ enforces matters because the inspection checklist changed between editions. The 2022 edition expanded the 11-point checklist to 13 points. The current published edition is the 2025 edition.

The 2022 edition is the most widely adopted in current AHJ enforcement for commercial and institutional buildings. Some state and local fire codes still reference the 2019 or 2016 editions. Healthcare facilities under CMS (Centers for Medicare and Medicaid Services) jurisdiction are surveyed under the CMS-mandated 2012 edition of NFPA 101, which references the 2010 edition of NFPA 80. This means a CMS-surveyed hospital must comply with the 2010 NFPA 80 checklist, not the 2022 or 2025 editions. Always confirm the specific edition your AHJ enforces before conducting or commissioning the annual inspection.

The CMS edition discrepancy that generates the most healthcare facility confusion: Healthcare facility managers who research current NFPA 80 requirements and apply the 2022 or 2025 edition requirements during internal audits may prepare documentation that CMS surveyors do not recognize, because CMS surveys under the 2010 edition. Conversely, preparing only for the 2010 edition while the local AHJ has adopted the 2022 edition means the facility does not meet current local fire code requirements. Healthcare facilities are subject to both CMS survey requirements and local AHJ fire code enforcement, and these can require compliance with different NFPA 80 editions simultaneously. Coordinate with your fire door inspection professional to document compliance with both editions.

Preventive Maintenance Schedule: Monthly, Quarterly, and Seasonal Tasks

Monthly Quick Visual Check: All Fire Doors and High-Traffic Hardware

Door closer operation (all fire doors)

Open each fire door fully and release it. The door must return to the fully closed and positively latched position without any manual assistance. A door that stops short of closing, fails to latch, or requires a push to complete the last 6 inches of travel has a closer deficiency under NFPA 80 checklist item 6. Document any door that fails this test and schedule corrective action before the annual inspection.

Release door from full open: confirm it closes and latches without assistance
Check for slamming: a door that slams has an incorrect latch speed valve setting
Observe closing speed: dramatically slower than normal indicates hydraulic fluid thickening or seal failure

Positive latch verification (all fire doors)

After the door closes under closer force, attempt to push it open without operating the lever or pressing the push bar. A fire door that can be pushed open without lever operation after closing under closer force is not positively latched. This is an immediate NFPA 80 deficiency requiring corrective action before the next inspection.

Propped door check

Verify no fire doors are propped or wedged open with non-listed devices: kick-down stops, chair legs, door wedges, or stacked materials. This is the simplest and most prevalent NFPA 80 violation, requires no tools to correct, and is documented on virtually every multi-building inspection as a recurring finding.

Quarterly Hardware Inspection and Adjustment: All Commercial Doors

Door closer inspection and adjustment

Inspect the closer body and arm for hydraulic oil leakage. Any visible oil on the closer body surface, the closer arm, or the door surface below the closer indicates seal failure. A leaking closer cannot maintain consistent speed and force settings: replace it before oil loss produces a closing speed or force deficiency. Adjust sweep speed (S valve) and latch speed (L valve) if the door is closing too fast or too slowly. On LCN 4040XP closers, both valves are located on the end of the closer body and can be adjusted with a small flat-blade screwdriver: turn clockwise to increase speed resistance (slower closing), counterclockwise to decrease resistance (faster closing). Browse LCN 4040XP closer adjustment parts and replacement components.

Exit device inspection

Operate the push bar on every exit device door. The push bar must move smoothly, the latch must retract fully on bar depression, and the latch must return fully to the extended position when the bar is released. A push bar that sticks, a latch that does not fully retract, or a latch that does not return fully on release indicates spring wear or mechanism wear requiring parts replacement. Browse Von Duprin exit device latch return springs and mechanism parts.

Cylindrical and mortise lock inspection

Operate each lever through its full range of motion. A lever that droops (sags below horizontal at rest), does not return to horizontal after release, or is loose on the spindle needs attention. Droop indicates worn spindle or lever return spring. Loose lever indicates worn spindle connection. Browse Schlage ND Series lever return spring and spindle parts.

Hinge check

Open each door and lift gently on the free corner. Movement of more than 1/16 inch at the free corner indicates hinge bearing wear that allows the door to sag, which will eventually produce excessive door-to-frame clearances at the top latch side (the NFPA 80 1/8-inch maximum is easy to exceed on a sagging door). Squeaking hinges indicate dry bearing surfaces: apply light machine oil to the pin.

Seasonal (Fall and Spring) Closer Calibration and Environmental Checks

Fall: exterior closer calibration for winter

Door closer hydraulic fluid thickens in cold temperatures, increasing resistance in both the closing direction and the opening direction. The closing speed may slow to the point where the door does not positively latch on cold mornings. The opening force may increase beyond the ADA 5-pound maximum. Before winter, adjust exterior door closers' sweep speed valves to slightly faster settings that will produce correct latching speeds when the fluid thickens. Check that the adjusted closing force still latches the door positively at the anticipated cold temperature.

The cold-weather ADA compliance violation that only appears in winter and is missed by spring inspections: An exterior closer on an accessible entry that meets ADA opening force limits at the time of the annual inspection in summer may generate significantly more than 5 pounds of opening force in January when the hydraulic fluid is cold and thick. This is a recurring ADA compliance violation in cold climates that is systematically missed by annual inspections conducted in warm weather. The correct practice is to test ADA opening force on exterior accessible entries during winter conditions, not only during the annual inspection. If the closer cannot achieve ADA compliance with cold fluid by valve adjustment alone, the closer cylinder may need replacement with an LCN model rated for low-temperature operation. Browse LCN low-temperature closer components.

Spring: check for oil seepage after winter

Temperature cycling through winter stresses hydraulic seals in door closers. As temperatures warm in spring, oil that migrated past a compromised seal during winter may become visible. Inspect all exterior closer bodies for oil film on the housing, arm, or door surface beneath the closer. Spring is the highest-rate season for discovering closer seal failures that developed during winter temperature cycling.

The NFPA 80 2022 Edition 13-Point Annual Inspection Checklist

Labels visible and legible

The fire rating label on the door leaf (typically riveted to the hinge edge), frame, glazing, and hardware must be present, visible, and legible. Labels painted over during building repainting are a commonly cited deficiency. Labels are required to remain permanently affixed and legible for the life of the assembly.

No open holes or breaks in door or frame surfaces

Any holes, cracks, breaks, or penetrations in the door leaf or frame that were not part of the original listed assembly constitute a deficiency. This includes unauthorized hardware holes, broken glazing retainer areas, or damaged door face material. Minor dents that do not penetrate the door face are not typically cited.

Glazing listed and intact

Any glazing in the fire door assembly must be fire-rated, labeled, and free of cracks, chips, or damage. Non-fire-rated glazing (such as standard tempered glass) substituted for fire-rated glazing is a deficiency regardless of appearance. The glazing label must be visible and legible.

Door clearances within listed tolerances

Measure door-to-frame clearances at the head (top), both jambs (sides), and the bottom. NFPA 80 specifies maximum clearances: typically 1/8 inch at the head and jambs, 3/4 inch at the bottom (sill clearance). Excessive clearances allow smoke passage and compromise the fire separation. Clearances can increase over time from door warpage, hinge wear, or frame movement.

Door operates freely without manual assistance

The door must open and close smoothly without binding, sticking, or requiring extraordinary force. Binding indicates hinge misalignment, frame movement, or door warpage. A door that cannot be opened or closed smoothly by a person of normal strength under normal conditions may fail ADA requirements as well as this inspection point.

Self-closing device closes door from any open angle

The door closer (or spring hinge at 20-minute rating) must return the door to the fully closed position from any angle of opening, including full open (90 degrees or more). A door that closes from 30 degrees but stalls at 60 degrees fails this test. Conduct the release test at multiple open angles to confirm consistent closer performance.

Positive latching: latch bolt engages strike when door closes

After the closer returns the door to the closed position, the latch bolt must engage the strike plate without manual operation of the lever or any other hardware. This is the most consequential test in the inspection: a door that closes but does not latch provides no fire separation. Verify latch engagement by attempting to push the door open from the closed position without operating the lever.

Hardware is listed for the fire door assembly

Every component installed on the fire door assembly must carry a fire listing appropriate to the door's rating and must be compatible with the assembly as specified in the Builders Hardware Template (BHT) for the specific door model. Non-listed replacement hardware (including hardware that appears identical to the listed original) is a deficiency. Verify that every hinge, lock, closer, and exit device carries visible fire rating labels.

No field modifications affecting the fire rating

Unauthorized holes, cut-outs, added hardware, or other field modifications that were not part of the original tested assembly void the fire rating and are a cited deficiency. Added hardware includes non-listed kickplates (some kickplates affect door clearances), non-listed viewers, and any surface-mounted device not specified in the door's BHT. Mechanical dogging of fire exit hardware is also cited here as it prevents positive latching.

Meeting edge protection for pairs (astragal or edge seal)

Double-door fire assemblies require meeting edge protection: an astragal or meeting edge seal that closes the gap between the two door leaves when both are in the closed position. This seal prevents smoke passage through the center gap before the fire-rated door material reaches its rated performance temperature. Missing, damaged, or improperly positioned meeting edge protection is a deficiency on pair openings.

Perimeter seals and gasketing present and intact

Fire door assemblies that require smoke control (S designation) must have perimeter seals or gasketing present and in good condition. Seals that are missing, damaged, compressed flat, or separated from the door or frame edge are a deficiency. Even on non-S-labeled assemblies, any required gasketing specified in the BHT must be present and intact.

Required signage present and compliant

NFPA 80 requires certain fire doors to have signage indicating "Fire Door Keep Closed" or similar language specified in the standard. Signage requirements vary by occupancy and door location. Inspect that required signage is present, legible, and correctly positioned. Missing or illegible signage is a deficiency. Decorations affixed to fire doors that cover the required signage or the fire rating label are also cited.

Auxiliary hardware does not prevent closing or latching

Any hardware installed on the door or frame that prevents or impedes the door from closing and latching is a deficiency. Common culprits: kick-down door stops (directly prohibited), furniture pushed against the door swing path, non-listed electromagnetic hold-opens not connected to the fire alarm system, and non-listed security bars or barricade devices.

Most Common NFPA 80 Deficiency Categories and the Parts That Fix Them

~45% of failures

Improper Door Closer Adjustment: Door Does Not Close or Latch Fully

The single most common inspection deficiency. Root cause is most often incorrect latch speed valve (L valve) setting that allows the door to slow before the latch engages the strike. Also caused by worn closer springs that no longer produce sufficient force for full closure, or by hydraulic seal failure that allows fluid loss over time.

Adjust before replacing: On LCN 4040XP Series, turn the L (latch) speed valve counterclockwise slightly to increase latch closing speed. If valve adjustment reaches its limit without achieving full latch, or if oil is visible on the closer body, closer spring or cylinder replacement is needed.

LCN door closer parts: springs, cylinders, and adjustment components LCN 4040XP Series complete parts catalog

Common

Excessive Door-to-Frame Clearances: Gaps Exceed 1/8 Inch

Excessive head and jamb clearances allow smoke passage and indicate door warpage, hinge wear, or frame movement. Identify the cause before specifying the fix. Hinge-side gap that is larger at the top than the bottom indicates hinge sagging from worn bearings or loose mounting screws. Tighten hinge screws first. If screws are stripped, use longer screws with Heli-coil inserts to restore thread engagement. If bearing wear is the cause, replace hinges.

Latch-side gap that is excessive indicates strike misalignment or door warpage. Strike adjustment addresses misalignment. Door warpage requires door replacement.

Von Duprin strike plate parts for strike adjustment

Common

Non-Listed Hardware Installed on Fire-Rated Assemblies

Repair personnel install standard commercial hardware in place of fire-listed hardware that appears physically identical. The fire rating label on the device is the only field-visible indicator of fire-listed status. A Schlage ND Series cylindrical lock in the non-fire-rated version is visually identical to the fire-rated version: only the lock case label distinguishes them. Inspect every hardware component label after any repair or replacement on a fire-rated opening. Replace non-listed hardware with OEM fire-listed parts from authorized suppliers.

Schlage ND Series fire-listed cylindrical lock parts (OEM only) Schlage L Series fire-listed mortise lock parts (OEM only)

Common

Mechanical Dogging of Fire Exit Hardware

Facilities staff use hex keys on fire exit devices during business hours to hold the latch retracted, preventing positive latching. This is explicitly prohibited by NFPA 80 and is cited in virtually every multi-building inspection. The corrective action is to remove the dogging key, educate staff, and consider replacing the device with an LD (Less Dogging) version that physically cannot be mechanically dogged, or installing electric dogging connected to the fire alarm panel for the push-pull function without the compliance risk.

Von Duprin exit device LD (Less Dogging) versions and parts

Lubrication Guide: Right Product for Each Hardware Type

Hardware Component	Correct Lubricant	Incorrect (Avoid)	Frequency
Cylinder plug (keyway interior)	Graphite powder or dry PTFE (Teflon) spray	WD-40, oil, grease (attracts dust, creates gummy residue)	Annually or when stiff
Hinge pin and knuckle bearings	Light machine oil (3-in-1 type) or silicone lubricant, applied sparingly to pin	Excess grease (collects debris and accelerates bearing wear)	Semi-annually or when squeaking
Exit device push bar pivots and latch	Dry PTFE or light oil applied with cloth to pivot points	Spray lubricant directly into assembled device (overspray coats springs)	Quarterly for high-cycle doors
Closer arm spindle connection	Small amount of grease at spindle connection point; wipe clean	Lubricant inside closer body: sealed hydraulic unit, contamination voids warranty	Semi-annually
Mortise lock latch bolt	Light machine oil on latch bolt face and tailpiece	Grease (attracts debris and can harden in cold temperatures)	Annually or when sluggish
Strike plate interior	Light oil or dry PTFE on strike keeper interior	Nothing inside electric strike keeper (lubricant degrades solenoid components)	Annually

For OEM replacement parts when lubrication and adjustment no longer restore correct function, browse LCN door closer parts, Von Duprin exit device parts, Schlage cylindrical lock parts, and Von Duprin complete parts catalog at SecurityParts.com. Parts support at 845-935-0301 or the SecurityParts.com contact page.

Why Choose Security Parts for Inspection-Driven Hardware Parts

CMS K0223 edition discrepancy documented, cold-weather ADA compliance failure mechanism, non-listed hardware identification guidance, LD specification for dogging prevention, and same-day OEM shipping.

CMS Edition Discrepancy

We document that healthcare facilities under CMS jurisdiction must comply with the 2010 NFPA 80 edition (via the 2012 NFPA 101 reference), not the current 2022 or 2025 editions. This edition discrepancy affects which inspection checklist applies for K0223 survey compliance and is not documented by any competitor.

Cold-Weather ADA Closer Failure

We document the hydraulic fluid viscosity increase that causes exterior door closers to exceed ADA opening force limits in winter even though they passed the same test during summer. This seasonal ADA violation is systematically missed by annual inspections conducted in warm weather.

Fire-Listed Hardware Identification

We document that fire-rated and non-fire-rated versions of Schlage ND and L Series locks appear physically identical: the lock case label is the only field-visible indicator. Ordering OEM fire-listed parts from SecurityParts.com prevents non-listed hardware deficiencies.

Same-Day OEM Shipping

OEM parts for inspection deficiency correction ship same day from US warehouses. Call 845-935-0301 or the contact page for inspection-driven part number identification support.

What Makes Security Parts Different for Maintenance and Inspection Parts

We document the CMS K0223 tag and the edition discrepancy between what healthcare facilities read in current NFPA 80 publications and what CMS actually surveys against (the 2010 edition via the 2012 NFPA 101 reference). No competitor documents this at the parts ordering level, and it creates false compliance confidence in healthcare facility maintenance programs.
We document the cold-weather ADA opening force violation on exterior door closers as a seasonal phenomenon caused by hydraulic fluid viscosity increase. This is the specific mechanism behind the most common unexplained winter ADA complaint at exterior accessible entries, and is never documented in preventive maintenance guides at the parts level.
We document the closer body lubrication myth: do not add lubricant inside an LCN 4040XP or similar sealed hydraulic closer body. Many facility maintenance workers believe lubricating the closer body improves performance; it actually contaminates the hydraulic fluid and voids the warranty.
We document the 76 percent fire door inspection failure rate and the specific distribution of deficiency types, with the 45 percent closer adjustment failure being both the most common and the most preventable with correct quarterly maintenance and OEM parts.
We carry LCN door closer parts, Von Duprin exit device parts, Schlage ND Series lock parts, and Schlage L Series mortise lock parts for all common inspection deficiency corrections in one order from an authorized OEM supplier.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions About NFPA 80 Inspection and Door Hardware Maintenance

How often is NFPA 80 annual fire door inspection required?

NFPA 80 requires annual inspection of every fire door assembly by a qualified person, plus an inspection immediately after initial installation and after every maintenance event that could affect compliance. The current published edition is 2025; the 2022 edition is most widely adopted in AHJ enforcement. Healthcare facilities under CMS jurisdiction are surveyed to the 2010 edition of NFPA 80 (via the CMS-mandated 2012 NFPA 101 reference). Confirm which edition your AHJ enforces before conducting the inspection. Building owners bear ultimate responsibility for ensuring annual inspections occur and are documented.

What are the 13 items on the NFPA 80 annual fire door inspection checklist?

The 2022 edition 13-point checklist: (1) Labels visible and legible, (2) No holes or breaks in door or frame, (3) Glazing listed and intact, (4) Door clearances within tolerances (1/8 inch sides/top, 3/4 inch bottom), (5) Door operates freely, (6) Self-closing device closes from any open angle, (7) Positive latching: latch bolt engages strike without manual assistance, (8) Hardware listed for the assembly, (9) No unauthorized field modifications, (10) Meeting edge protection for pairs, (11) Perimeter seals intact if required, (12) Required signage present, (13) Auxiliary hardware does not prevent closing or latching.

What causes hydraulic door closers to fail ADA compliance in winter?

Hydraulic fluid thickens in cold temperatures, increasing resistance in the closing mechanism. The increased fluid viscosity raises the force required to push the door open against the closer arm's compression, which can exceed the ADA 5-pound maximum on exterior accessible entries during cold weather even though the same closer passed ADA testing in warmer months. Seasonal closer recalibration in fall and spring, and testing opening force under cold conditions, prevents winter ADA violations at accessible exterior entries.

What is the CMS K-tag K0223 and why does it matter for healthcare facilities?

K0223 is the CMS Life Safety Code survey tag covering fire door deficiencies in CMS-certified healthcare facilities. It is consistently one of the most-cited tags in CMS surveys. CMS enforces the 2010 edition of NFPA 80 (via the 2012 NFPA 101 reference), not the current edition. K0223 citations require a Plan of Correction with specific deadlines. Healthcare facilities should maintain inspection documentation aligned with the 2010 NFPA 80 requirements for CMS survey purposes, even if local AHJ enforces a later edition.

What are the most common NFPA 80 fire door inspection deficiencies?

Industry inspection data indicates 76 percent of fire doors fail at least one inspection point. The most common in order: improper door closer adjustment (approximately 45 percent of all failures; door does not fully close and latch), excessive door-to-frame clearances from hinge wear or door warpage, mechanical dogging of fire exit hardware by facilities staff, non-listed replacement hardware installed during repairs, and painted-over or illegible fire rating labels. All are correctable with proper maintenance and OEM parts.

What lubricants should be used on commercial door hardware and what should be avoided?

Cylinder plugs: graphite powder or dry PTFE only (oil attracts dust and creates gummy residue). Hinge pins: light machine oil applied sparingly. Exit device pivots: dry PTFE or light oil on pivot points; do not spray into the assembled device. Closer arm spindle: small amount of grease at the spindle connection only; never add lubricant inside the closer body (sealed hydraulic unit; added lubricant contaminates hydraulic fluid and voids the Allegion warranty). Mortise lock latch: light machine oil on bolt face. Strike keeper interior of mechanical strikes: light oil; never apply lubricant inside an electric strike keeper.

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Security Door Parts: Complete Guide to Commercial Door Hardware Components Wednesday, July 29, 2026

Every commercial door relies on multiple hardware devices working together. An exit device controls egress. A door closer controls the closing arc. A lock controls access. An electric strike or deadbolt provides the final locking point. Each of these devices contains multiple components, and any one of those components can wear or fail independently.

The practical advantage of understanding security door parts at the component level is significant. A facility manager who can identify a worn dogging shaft on a Von Duprin exit device and order the correct replacement part by number avoids both a full device replacement cost and a multi-day wait for a distributor quote. A locksmith who knows the difference between a chassis assembly for an ND Series lock and one for an ALX Series completes a service call in one visit instead of two.

This guide covers every major category of commercial security door parts, what each component does, what wears out first, and how to identify and order the right replacement. Browse the complete commercial door hardware parts catalog at SecurityParts.com.

What Security Door Parts Are Found on a Commercial Opening

A complete commercial door opening typically contains six to eight distinct hardware devices. Each device has its own parts structure, its own wear pattern, and its own parts catalog. Understanding which device category you are working on is the first step to ordering the right component.

Exit Devices

Function: Code-compliant egress on fire-rated and high-occupancy doors

Brands on site: Von Duprin, Falcon

Key parts: Latch assembly, dogging assembly, end cap, strike plate, push bar, vertical rods (SVR/CVR)

Browse: Exit device parts guide

Door Closers

Function: Controls closing speed, force, and ADA compliance

Brands on site: LCN

Key parts: Closer arm, shoe bracket, spring cover, mounting hardware, body replacement

Browse: Door closer parts guide

Cylindrical Locks

Function: Primary access control on commercial doors

Brands on site: Schlage (ND, ALX, T Series), Falcon

Key parts: Chassis assembly, tailpiece, lever trim, latch assembly, strike plate, cylinder

Browse: Cylindrical lock parts guide

Mortise Locks

Function: Heavy-duty access control on institutional and high-security doors

Brands on site: Schlage (L Series, MA Series), Falcon

Key parts: Latch assembly, armor front, case cover screw, chassis, cylinder trim, thumbturn

Browse: Mortise lock parts guide

Electric Strikes

Function: Remote latch release for access control integration

Brands on site: Von Duprin

Key parts: Strike housing, keeper, solenoid assembly, mounting hardware

Browse: Electric strike parts catalog

Deadbolts

Function: Secondary locking on commercial doors requiring added security

Brands on site: Schlage (B Series), Falcon

Key parts: Deadbolt cylinder, strike plate, tailpiece, rose assembly

Browse: Deadbolt parts catalog

Exit Alarms

Function: Audible alarm on doors that should remain closed except for emergencies

Brands on site: Von Duprin, Detex

Key parts: Alarm housing, battery assembly, mounting hardware, magnet contacts

Browse: Exit alarm parts catalog

Door Operators

Function: Automated door operation for ADA compliance and high-traffic access

Brands on site: LCN

Key parts: Drive belt, motor assembly, sensor, push plate battery, mounting hardware

Browse: Door operator parts catalog

Exit Device Parts: What Wears Out and Why

Exit devices are the most actively used hardware on any commercial door. On a high-traffic door in a school, hospital, or retail building, the push bar can be actuated hundreds of times per day. That cycle count is what determines which internal parts require attention first. For a full technical breakdown of exit device components by type and series, see the commercial exit device parts guide at SecurityParts.com.

Von Duprin 98/99 Series exit device: one of the most widely installed exit device families in North American commercial construction. Browse exit device security door parts at SecurityParts.com.

Dogging Assembly

The dogging assembly holds the push bar depressed so the door operates as a push-pull entry without latching during business hours. The dogging shaft, dogging adapter, and dogging adapter spring are the three components that wear as a unit. The shaft strips under a poorly seated hex key. The adapter spring fatigues under repeated use. The adapter housing cracks under impact.

Dogging shaft failure shows as a hex key that spins without engaging
Spring failure shows as a device that will not hold in the dogged position
Always replace the shaft, spring, and adapter together on a worn assembly
Dogging is not available on fire-rated exit hardware (F-prefix models)

Latch Assembly

The latch assembly is the spring-loaded component that engages the strike and keeps the door latched when closed. The latch bolt, latch case, and latch return spring are the components that fail on high-cycle openings. A door that will not stay latched, or one that requires significant push bar force to disengage, almost always points to a worn latch assembly rather than a problem with the strike.

Rim devices use a single latch at the frame jamb
Vertical rod devices use top and bottom latches simultaneously
Latch kits are sold separately for top and bottom on CVR devices
Fire devices require different latch bracket quantities than panic devices

End Cap and Case Cover

The end cap is the plastic or metal component that closes the hinge-side end of the exit device body. It breaks under repeated contact with walls, carts, and equipment. When the end cap breaks, the cover plate slides off and exposes the internal mechanism. The 900397 impact-resistant metal end cap kit is the recommended upgrade over the original plastic version on high-use openings.

Strike Plate and Floor Strike

The strike plate receives the latch bolt on every door close. On rim devices, the strike mounts on the frame jamb. On surface vertical rod and concealed vertical rod devices, separate strikes mount at the door header and floor. The floor strike takes the most impact and wears first on vertical rod devices. A misaligned or worn strike often looks like a latch problem until the strike itself is inspected.

Door Closer Parts: The Most Active Component on the Door

A door closer cycles every time the door opens and returns to closed. On a busy commercial entrance, that can mean 500 or more cycles per day. The arm assembly transmits mechanical load from the door to the frame on every single cycle, which is why arm components wear before the closer body itself. For detailed LCN closer component identification, see the door closer parts guide at SecurityParts.com.

LCN 4000 Series surface-mounted door closer: the commercial standard in hospitals, schools, and office buildings. Browse door closer security door parts at SecurityParts.com.

Arm and Shoe Bracket

The arm assembly connects the closer body to the frame. The shoe bracket mounts on the frame and receives the forearm. The shoe bracket screws take the full mechanical load of every closing cycle, which is why loose bracket screws are the most common cause of arm damage. A bent forearm or a cracked arm body always requires an inspection of the shoe bracket before the new arm is installed.

Regular arm, parallel arm, and top jamb arm configurations are not interchangeable
3-foot and 4-foot arm sizes apply to different door widths
Fully tighten all shoe bracket screws before completing installation

Spring Cover and Mounting Hardware

The spring cover plate protects the spring tube on the closer body. A missing or cracked cover exposes the valve ports on exterior and vestibule closers. Mounting screws that strip in hollow metal doors are among the most common installation problems on replacements. Replacement mounting hardware and cover plates are available individually and are far less expensive than replacing the closer body.

Seasonal valve adjustment is a normal part of door closer maintenance: Hydraulic fluid in commercial door closers changes viscosity with temperature. A closer that passes ADA closing speed requirements in summer may close too fast in cold weather as the fluid thickens. Adjusting the sweep and latch valves seasonally is routine maintenance, not a sign of a failing closer. For full guidance, see the commercial door hardware maintenance checklist.

Lock Parts: Cylindrical, Mortise, and Deadbolt Components

Commercial locks contain more individual components than any other hardware category, and the specific parts that apply depend entirely on the lock series and function. Getting the series right before ordering any lock component is the most important step in the parts identification process. For cylindrical lock component breakdown, see the cylindrical lock parts guide at SecurityParts.com. For mortise lock component identification, see the mortise lock parts guide at SecurityParts.com.

Schlage ND Series cylindrical lock: standard commercial lock in offices, schools, and institutions. Browse cylindrical lock security door parts at SecurityParts.com.

Chassis Assembly

The chassis is the structural core of a cylindrical lock. It houses the latch mechanism, the lever return spring, and the tailpiece connection. When the chassis wears, the lock fails to latch reliably or the lever stops returning to position. Chassis assemblies are function-specific: a storeroom function chassis is not interchangeable with an office function chassis even within the same lock series. Always confirm the function code before ordering.

Tailpiece

The tailpiece links the cylinder to the internal lock mechanism and transmits key rotation to the latch or deadbolt. A failed tailpiece prevents the key from engaging the lock. Tailpieces are cylinder-format specific: FSIC (Full-Size Interchangeable Core) and SFIC (Small Format Interchangeable Core) tailpieces are different components and are not interchangeable. Confirm the cylinder format before ordering any tailpiece replacement.

Strike Plate (ANSI Strike)

The ANSI strike plate mounts on the door frame and receives the latch bolt on every door close. Strike plates wear at the latch pocket over time, particularly on high-traffic doors with heavy closing force. The 10-025 ANSI strike (4-7/8" x 1-1/4") is the most commonly replaced strike on commercial Schlage lock installations. Strike plates are one of the few security door parts that cross multiple lock series and brands.

Lever Trim and Rose Assembly

Lever trim is the finish-visible component that handles the most physical contact of any part on the lock. Levers that work loose, fail to return to position, or show finish wear are candidates for replacement before the lever shaft or chassis reaches the end of its service life. Rose assemblies hold the lever mechanism against the door face. Finish codes must match the installed hardware when ordering lever trim replacements.

Schlage L Series mortise lock: institutional-grade lock used in hospitals, universities, and high-security commercial facilities. Browse mortise lock security door parts at SecurityParts.com.

Mortise Lock Components

Mortise lock parts are more numerous and more model-specific than cylindrical lock parts. The Schlage L Series alone covers over sixty distinct model functions, and the chassis assembly, armor front, and cylinder trim components for an L9070 are different from those for an L9080. Confirm the exact model number stamped on the lock body before sourcing any mortise lock component. For the full breakdown by model and component category, see the Schlage L Series parts diagrams guide.

Electric Strike Parts and Deadbolt Parts

Electric Strike Parts

An electric strike replaces the standard strike plate and allows remote latch release as part of an access control system. The strike housing, keeper, and solenoid assembly are the main components. When an electric strike fails to release on a valid credential, the solenoid is typically the first component to check. When it fails to hold the door closed, the keeper and housing alignment need inspection before the solenoid is replaced. For a full component breakdown, see the electric strike parts guide.

Electric strikes are also used in access control integration alongside exit devices and locksets. For guidance on how electric strikes fit into a broader access control system, see the access control and commercial door hardware integration guide.

Deadbolt Parts

Deadbolts provide a secondary locking point on commercial doors where the primary lock function alone is not sufficient. The deadbolt cylinder, strike plate, tailpiece, and rose assembly are the main replacement components. Deadbolt strike plates are a frequent replacement on doors where the deadbolt is engaged under misalignment, which causes the strike pocket to elongate over time. For component identification on Schlage B Series deadbolts, see the deadbolt parts guide.

How to Identify Security Door Parts by Brand and Series

Correct parts identification is the difference between a repair completed in one service visit and a job that drags through two return trips and a wrong-part delay. Every security door part order should start with three pieces of confirmed information before any part number is looked up.

Find the brand name on the device body The brand name is printed or stamped on the mechanism case, the closer body, or the lock chassis. On commercial hardware, the brand is almost always visible without disassembly. The brand determines which parts catalog applies.
Confirm the series or model number The series designation appears near the brand name on a label or as a stamped code. For Von Duprin exit devices, this is a number like 98, 99, 22, or 88. For LCN closers, it is a four-digit number like 4040 or 1461. For Schlage locks, it is a letter-number combination like ND, L9070, or B60N. The series determines which specific parts apply and which parts do not cross-reference.
Use a parts diagram to confirm the component Parts diagrams show the exploded view of the device with every component labeled and numbered. Identifying the failed component visually against the diagram confirms the part number before anything is ordered. SecurityParts.com provides interactive parts diagrams for every supported brand and series.
Confirm finish if ordering visible trim components Lever trim, rose assemblies, end caps, and cover plates are finish-sensitive. The replacement must match the installed finish code. Sending back a satin chrome part when satin stainless was needed costs real time and money.
Note manufacture date for older devices On older devices, the manufacture date affects which dogging parts apply. Von Duprin exit devices manufactured before August 1997 use different dogging replacement kits from current-specification parts. The manufacture date typically appears near the model number on the device label.

Call 845-935-0301 before ordering parts for an older or unfamiliar device: SecurityParts.com provides pre-order parts identification support for all supported brands and series. If the label is worn, the series is unclear, or the device is old enough that standard parts may not apply, the team can confirm compatibility before the order ships. This is especially important on fire-rated hardware where an incorrect part creates a NFPA 80 compliance failure.

Brand and Series Reference for Security Door Parts

Brand

Main Series and Parts Coverage

Von Duprin

Exit devices: 98/99 Series (rim and CVR), 22 Series (rim), 33A/35A Series, 75/78 Series, 88 Series, 94/95 Series. Electric strikes. Exit alarms.

LCN

Door closers: 1000 Series, 4040XP (4000 Series), 3030/3130 concealed, 2010/5010 concealed, 2210 high-security. Door operators: Benchmark 9130/9140/9150, Senior Swing 9500/2800, Auto Equalizer.

Schlage

Cylindrical locks: ND Series, ALX Series, T Series. Mortise locks: L Series (60+ function codes), MA Series. Deadbolts: B Series. Electronic: AD Series, CO Series, NDE Series.

Falcon

Exit devices: 19 Series, 24 Series, 25 Series. Mortise locks: MA Series. Cylindrical locks and trim components.

Detex

Exit alarms and exit alarm hardware. Door prop alarm components and mounting hardware.

Security Door Parts for Fire-Rated Openings

Fire-rated door hardware operates under specific requirements that go beyond what applies to standard commercial hardware. Every security door part replaced on a fire-rated opening must preserve the UL listing of the complete assembly. For a full overview of fire-rated door hardware requirements, see the commercial door fire rating guide.

OEM Parts Are Required on Fire-Rated Doors

NFPA 80 requires that fire door hardware be maintained using parts that preserve the original UL listing. A non-OEM replacement part installed on a fire-rated exit device or lock voids the UL listing and creates a compliance failure at the next annual fire door inspection. The failed inspection is not the worst outcome: a fire door that does not latch because a non-OEM latch kit was installed creates a liability that goes well beyond the inspection report.

Fire-rated exit hardware does not support dogging: NFPA 80 Section 4.7.1 prohibits any device that holds a fire door open in a manner not connected to the fire alarm system. Mechanical dogging is not permitted on fire-rated exit hardware. If a fire-rated exit device (F-prefix models) in your facility has a dogging mechanism installed, it is a fire code violation that will be cited on inspection. Fire-rated doors must close and latch automatically on every cycle.

OEM vs Aftermarket Security Door Parts

On standard interior doors in low-traffic applications, aftermarket parts sometimes function adequately in the short term. The problems appear on high-cycle commercial openings and on fire-rated assemblies. An aftermarket latch kit that does not meet the dimensional tolerances of the original part produces inconsistent latch engagement over time. An aftermarket dogging shaft that is slightly undersized strips faster than the OEM equivalent.

The decision is clear: use OEM parts for all fire-rated hardware, all Grade 1 ANSI/BHMA certified hardware in high-traffic applications, and any device where a parts failure has a direct security consequence. For a complete analysis of the OEM versus aftermarket parts decision on commercial hardware, see the OEM vs aftermarket commercial door hardware parts guide.

SecurityParts.com stocks only OEM replacement parts. Every component in the catalog is manufactured to the original specification, maintaining ANSI/BHMA certification and UL listing integrity on fire-rated and Grade 1 hardware.

How to Order the Right Security Door Parts the First Time

Commercial door hardware returns are expensive and delay repairs on openings that may be critical to building security or life safety. A few consistent habits eliminate most ordering errors.

Always confirm brand, series, and model number before looking up any part number. Never order by description alone.
Use parts diagrams to confirm the specific component visually before placing the order. SecurityParts.com provides diagrams for every supported brand and series.
Confirm finish code before ordering any trim component: lever trim, rose, end cap, or cover plate.
Confirm whether the device is panic or fire-rated before ordering latch kits, dogging parts, or cover plates.
Check the manufacture date on older devices before ordering dogging parts, where pre-1997 and post-1997 devices may require different components.
Inspect adjacent components when replacing a worn part. A failed dogging spring often means the dogging adapter and shaft are also near the end of their service life.

For troubleshooting guidance when a security door part failure is not producing an obvious symptom, see the commercial door hardware troubleshooting guide. For code-compliance guidance on panic hardware, see the panic hardware for commercial doors guide.

For guidance on ANSI/BHMA Grade ratings and how they affect parts selection across every hardware category, see the ANSI/BHMA door hardware standards guide.

Why Choose SecurityParts.com for Security Door Parts

SecurityParts.com has supplied OEM commercial door hardware parts since 2001. The catalog covers Von Duprin exit devices, LCN door closers, Schlage and Falcon locks, and Detex exit alarms, with parts organized by brand, series, and component category.

Parts diagram lookup for every supported series: Confirm the exact component visually before ordering. The interactive diagram shows where each part sits in the assembly and gives the part number directly.
OEM parts only: Every component in the catalog is manufactured to the original specification, maintaining ANSI/BHMA certification and UL listing integrity on fire-rated and Grade 1 hardware.
Parts for current and older series: The catalog covers devices still in service from older series alongside current production models. If a part is needed for an older device, call 845-935-0301 to confirm availability before ordering.
Pre-order identification support: Call 845-935-0301 or email [email protected] to confirm the correct part for your specific device before the order ships. This is available for any supported brand and series.
Same day shipping: Same day shipping on stocked OEM parts from US warehouses.

Browse exit device parts, door closer parts, cylindrical lock parts, mortise lock parts, electric strike parts, deadbolt parts, exit alarm parts, and door operator parts using the category links throughout this guide. For the complete catalog, visit all commercial door hardware parts at SecurityParts.com. Contact the team at 845-935-0301 or email [email protected].

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM replacement parts for commercial door hardware since 2001. The team provides parts identification and pre-order compatibility support for Von Duprin exit devices, LCN door closers, Schlage and Falcon locks, and Detex exit alarms across commercial, institutional, healthcare, and government facilities. For security door parts identification and same-day shipping support, call 845-935-0301 or email [email protected].

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Electrified Mortise Lock vs Electric Strike: Complete Comparison and Selection Guide Tuesday, July 28, 2026

An electric strike installs in the door frame, releases the latch keeper on a credential signal, and works with the existing mechanical lock on the door. An electrified mortise lock replaces the lock body inside the door and controls whether the outside lever can turn. Electric strikes are lower cost, easier to retrofit, and the correct choice for automatic door operator applications. Electrified mortise locks are more secure, have no sideload failure mode, integrate monitoring without additional hardware, and are the correct specification for high-security, high-traffic openings where precise tolerances and reliable release under all conditions are required. On fire-rated doors: fail-safe electric strikes cannot maintain positive latching and are prohibited; fail-secure electric strikes are permitted but cannot satisfy stairwell reentry requirements. For those, fail-safe electrified lever trim for fire exit hardware is the code-compliant solution.

The electric strike vs electrified mortise lock decision comes up in nearly every access control project. Both provide electronic access control. Both fail-safe or fail-secure modes are available on both. Both integrate with standard access control panels. The differences are in how they fail under pressure, how they wire, what they cost, and which code requirements they can satisfy. Making the wrong choice at specification time creates field problems that range from frustrating (a door that requires a pull-and-push to open) to code violations (a fail-safe strike on a fire door) to complete non-starters (using a mortise lock instead of a strike with an auto operator).

Browse SecurityParts.com for both hardware types: Von Duprin 5100, 6100, 6200, and 6300 Series electric strike parts, Schlage L Series electrified mortise lock parts, Schlage ND Series electrified cylindrical lock parts, and the complete Allegion electrified hardware catalog.

1886 Year D. Rousseau patented the electric door opener (electric strike) for remote apartment entry release

Sideload Most electric strike models fail to release reliably under sideload pressure from HVAC, misalignment, or seals

Auto Op Automatic door operators: electric strike is correct, electrified mortise lock is not (lever must turn to release latch)

1 wire Electric strike: all wiring in frame. Electrified mortise: wiring must cross from frame to door via hinge, EPT, or conduit

How Each System Works: The Core Mechanical Difference

Electric Strike

Frame-side release device

Mechanism

Replaces the fixed strike plate in the door frame. Contains a moving keeper (sometimes called a latch keeper or gate) controlled by a solenoid. In the locked state, the keeper holds the latch bolt. On a credential signal, the solenoid moves the keeper aside, allowing the latch bolt to pass through the frame opening. The door can be pushed open without any lever operation.

What stays mechanical

The entire lock on the door: lock body, latch bolt, lever, cylinder. All remain purely mechanical. Inside egress is always free by turning the lever or pushing the panic bar. The electric strike only controls whether the door can be opened from outside without turning the lever.

Solenoid operation

Most standard electric strikes use a solenoid to move the keeper. Solenoids have high inrush current at activation and produce heat during the holding state. High-cycle installations with long holding times accumulate heat in the strike body over time.

Electrified Mortise Lock

Door-side lever control device

Mechanism

Replaces the standard mechanical mortise lock body inside the door with a lock body that contains an electrical solenoid or motor. The electrical element controls whether the outside lever is free to turn. When electrically locked, the outside lever is blocked. On a credential signal, the solenoid or motor releases the lever block, allowing the outside lever to turn and retract the latch normally. The person enters by turning the lever.

What becomes electric

The lever control on the outside. The inside lever remains mechanical and always free for egress. The latch bolt itself always extends and retracts mechanically when the respective lever is operated.

Motor-driven options

Many current electrified mortise locks use motor-driven mechanisms instead of solenoids. Motors draw lower, more consistent current and run cooler than solenoids under continuous operation. They also provide quieter and more precise mechanical action.

Head-to-Head Comparison Across Every Key Factor

Factor	Electric Strike	Electrified Mortise Lock
Installation location	Door frame only; no work on door	Inside door; replaces mechanical lock body
Wiring path	Frame-side only; no cross-door wiring needed	Must cross from frame to door: electrified hinge, EPT, or surface conduit
Retrofit difficulty	Low: replaces existing strike plate	Higher: replaces entire lock body; must route cross-door wiring
Cost (hardware)	Lower; electric strikes are less expensive	Higher; complete electrified lock body plus wiring transfer device
Sideload release reliability	Poor: most models fail under sideload pressure	Excellent: lever retraction independent of frame pressure
Tolerance precision	Moderate: must accommodate multiple lock manufacturers; filler plates often needed	High: matched lock body and strike with precise latch tolerances
Monitoring integration	Requires separate RX switch and DPS for full monitoring	Can integrate lever monitoring, latch monitoring, and door position in one device
Automatic operator compatibility	Correct choice: releases latch without lever operation	Not compatible: operator cannot turn lever to retract latch before swinging door
Power consumption	Higher: solenoid inrush and holding current	Lower: motor-driven versions especially power-efficient
Heat generation	Solenoid generates heat during holding state	Motor versions run cool; solenoid versions produce less holding heat
Fail-safe / Fail-secure options	Both available; field-selectable on many models	Both available; factory-configured by order suffix
Fire door use (fail-secure)	Permitted: maintains positive latching in fail-secure mode	Permitted: electrified mortise with fail-secure maintains positive latching
Fire door use (fail-safe)	Prohibited: keeper releases, positive latching lost	Permitted: lever releases but latch bolt still projects; positive latching maintained
Aesthetic integration	Visible in frame; most are painted or plated	Concealed inside door; only lever and escutcheon visible

The Four Problems With Electric Strikes That Electrified Mortise Locks Don't Have

Problem 1: Sideload Failure

The most common electric strike field complaint is a door that does not open when the access control system releases it. The occupant receives the unlock signal (the indicator light changes or the reader beeps), pushes the door, and it does not move. Pulling the door slightly toward them relieves the pressure, and then the door opens freely.

This is the sideload problem. It happens when force from outside (HVAC positive pressure, a warped frame, weather seal compression, or silencer friction) pushes the door against the frame. The latch bolt under this sideload presses against the keeper face. When the solenoid activates and moves the keeper, the friction load from the compressed latch bolt prevents the keeper from pivoting freely. The door stays latched even though the release signal has been sent.

Electrified mortise and cylindrical locks do not have this problem. The outside lever retracts the latch bolt mechanically and internally, completely independent of any pressure on the door from the frame side. The door can be under substantial sideload pressure and the lever will still retract the latch cleanly.

The HVAC sideload source that generates the most electric strike complaints in large commercial buildings: HVAC supply and return pressure differentials between rooms and corridors create sustained positive pressure on corridor doors. In a building with a corridor that is slightly pressurized relative to the offices opening onto it, every door from the corridor to an office has the corridor pressure pushing the door against the office-side frame continuously. This is not a misalignment problem and it is not fixable by adjusting the strike. It is a building mechanical system condition. The correct specification for these doors is an electrified mortise lock, not an electric strike, because the mortise lock's lever retraction is not affected by the pressure differential.

Problem 2: Tolerance Slop with Mortise Locks

Electric strikes are designed to accommodate latch bolts from many different manufacturers. The center-line dimension of the latch bolt (its vertical position in the door edge) varies between mortise lock manufacturers even when the door and frame preparation follows a standard template. This requires the electric strike to have a keeper opening that is oversized enough to accommodate the range of latch bolt positions.

The practical result is that a door with an electric strike and a mortise lock has slightly more play (slop) at the latch than the same door with a fixed strike. This is subtle and many occupants never notice it. In high-security applications where door firmness under push-test is a security requirement, the slop is not acceptable. An electrified mortise lock's latch bolt and strike are matched components from the same manufacturer with precise tolerances, eliminating the slop entirely.

Problem 3: Solenoid Heat and Power Consumption

Standard electric strikes use a solenoid to move the keeper. Solenoids draw high inrush current at the moment of activation and continuous holding current while powered. In a fail-safe configuration where the solenoid is energized continuously (powered to lock), the solenoid generates heat throughout its powered time. In a heavily loaded access control system with multiple continuously powered fail-safe strikes, power supply sizing must account for the continuous holding current of all simultaneously powered strikes, not just their activation current.

Motor-driven electrified mortise locks use far less power and run significantly cooler. Most motor-driven locks draw power only during the transition between locked and unlocked states, not during the holding state. This makes them meaningfully more energy-efficient in always-on access control configurations.

Problem 4: Monitoring Requires Additional Hardware

A door with an electric strike typically requires a separate request-to-exit (RX) switch (or passive infrared request-to-exit detector) and a separate door position switch (DPS) to provide the access control panel with the full monitoring data it needs: who exited, when, and whether the door was properly closed afterward. These additional devices require additional conduit runs, additional work boxes, and additional programming at the access control panel.

An electrified mortise lock can combine lever monitoring, latch position monitoring, and door status monitoring in a single device with fewer additional conduit runs. On a project with many monitored openings, this difference in device count adds up significantly in labor and material cost.

The One Scenario Where Electric Strikes Are Clearly Superior: Automatic Door Operators

There is one application where the electric strike is not just acceptable but is actually the correct specification: any door equipped with an automatic door operator that opens the door by swinging it on a motorized arm.

Here is why: before the door operator arm can swing the door open, the latch must be retracted. An electric strike retracts the keeper at the frame, allowing the latch bolt to exit the frame opening as the door swings. The operator arm does not need to interact with the lock at all: it just swings the door and the electric strike handles the latch.

An electrified mortise or cylindrical lock presents a fundamental problem: the latch retracts only when the lever is turned. The automatic operator cannot turn the lever while simultaneously swinging the door open. The operator arm would swing the door against a still-latched latch bolt, stalling the operator or damaging the latch.

Von Duprin EL/QEL electric latch retraction exit devices are a partial exception: they retract the latch electrically, allowing the operator to swing the door without a lever operation. But for standard mortise and cylindrical lock applications with automatic operators, the electric strike remains the correct choice.

Browse Von Duprin electric strike parts for automatic operator applications at Security Parts.

Fire Door Rules: Where Each Device Can and Cannot Be Used

Fire-rated doors require positive latching under NFPA 80: the latch bolt must engage the strike on every door closure. This requirement intersects differently with each device type.

Electric Strike on Fire Doors

A fail-secure electric strike maintains its keeper in the closed (latch-holding) position when power is removed. When the door closes, the latch bolt engages the keeper, providing positive latching. This satisfies NFPA 80 and makes fail-secure electric strikes compliant on fire-rated doors. A fail-safe electric strike releases the keeper when power is removed. The spring-loaded keeper is the only mechanism holding the latch bolt in place. Under fire pressure conditions, this is insufficient for positive latching. NFPA 80 compliance is not met. Fail-safe electric strikes are prohibited on fire-rated doors.

Electrified Mortise Lock on Fire Doors

In both fail-safe and fail-secure modes, the latch bolt of an electrified mortise lock operates independently of the electrical state. The latch bolt always extends when the lever is released and always engages the strike when the door closes. The electrical element only controls whether the outside lever can turn. When power is removed (fail-safe), the outside lever can now be turned, but the door is still latched because the latch bolt is still extended. This makes fail-safe electrified mortise locks compliant on fire-rated doors in a way that fail-safe electric strikes are not: positive latching is maintained regardless of the electrical state.

The stairwell reentry scenario where both fail-safe and fail-secure have problems: Stairwell doors are fire-rated (requiring positive latching) and require reentry capability (unlocking on fire alarm so occupants can re-enter the building). A fail-safe electric strike cannot be used because it does not provide positive latching. A fail-secure electric strike cannot provide fail-safe reentry. The correct hardware is fail-safe electrified lever trim for fire exit hardware: the latch remains projected (positive latching maintained for fire door compliance) while the outside lever releases on power removal (fail-safe for reentry). An electrified mortise lock in fail-safe mode can also satisfy both requirements, since positive latching is maintained independent of electrical state while the lever releases fail-safe on power removal.

Wiring: What Each Device Requires in the Field

Electric Strike Wiring

All wiring for an electric strike runs through the door frame. The low-voltage conductors from the access control panel run to the electric strike location in the frame, connect to the strike, and that is the complete wiring path. No wiring crosses from the frame to the door. This is the reason electric strikes are the most straightforward retrofit option: the existing door, hinges, and lock body are untouched; only the frame strike plate location is modified.

Electrified Mortise Lock Wiring

An electrified mortise lock is installed inside the door. Power and signal wiring must travel from the access control panel in the frame, across the gap between frame and door, and into the door body. Three standard methods accomplish this:

Electrified hinge: Hinges with conductive elements in the hinge knuckles transfer low-voltage power from the frame-side barrel to the door-side barrel without any visible wiring crossing the door gap. This is the cleanest aesthetic solution and is invisible in the installed condition. The correct electrified hinge must match the hinge size and weight rating of the door.

Electric Power Transfer (EPT): A surface-mounted flexible loop device installed at the top or bottom of the door that bridges the frame-to-door gap with a flexible wire loop. More visible than an electrified hinge but compatible with any standard hinge installation without hinge replacement.

Surface conduit: Conduit routed visibly along the door edge from the frame connection point to the lock body. The least aesthetically clean solution, typically used in utility or industrial applications where aesthetics are not a priority.

Browse Schlage L Series electrified mortise lock parts and Schlage ND Series electrified cylindrical lock parts at Security Parts.

Scenario-Based Selection Guide

Use Electric Strike Retrofitting Access Control on an Existing Mechanical Lock

Why electric strike is correct

The existing door has a cylindrical or mortise lock in good condition. Adding access control without replacing the lock is the project goal. The electric strike replaces the strike plate in the frame with no modifications to the door or the existing lock. Wiring runs through the frame. Total installation impact is minimal. Von Duprin 5100 or 6100 Series electric strikes provide the correct Grade 1 performance for this application.

Use Electric Strike Automatic Door Operator Application

Why electric strike is correct

The door has an LCN automatic operator that opens the door by swinging it on an arm. The electric strike releases the latch at the frame, allowing the door to swing freely without any lever operation. An electrified mortise lock cannot be used because the operator cannot turn the lever to retract the latch before swinging. Von Duprin 6100 or 6300 Series electric strikes with the correct keeper for the installed lock type are the appropriate specification.

Use Electrified Mortise Lock High-Security Exterior Entry with HVAC Pressure Differential

Why electrified mortise lock is correct

The building's HVAC system creates corridor positive pressure that pushes the door against the frame continuously. An electric strike on this door will produce intermittent release failures requiring occupants to pull-and-push. An electrified mortise lock's lever retraction is independent of frame pressure and provides reliable release under all conditions. The Schlage L9080EL (electrified storeroom function) is the standard specification for electrified high-security perimeter doors without exit devices.

Use Electrified Mortise Lock High-Cycle Access-Controlled Corridor Door

Why electrified mortise lock is correct

A healthcare corridor door cycles 500 to 1,000 times per day under access control. The HVAC positive pressure from the pressurized corridor makes electric strike sideload failures frequent. The hospital requires quiet operation (QEL motor over EL solenoid eliminates noise). The electrified mortise lock's motor-driven mechanism provides quiet, reliable, low-heat operation at high cycle counts. Monitoring integration requirements (latch status, door position) are met in one device rather than three separate devices required with an electric strike.

Use Electrified Mortise Lock Stairwell Reentry Door (Fire-Rated, Fail-Safe Required)

Why electrified mortise lock (or fail-safe trim) is correct

Stairwell doors are fire-rated (positive latching required) and require fail-safe operation for reentry on fire alarm. A fail-safe electric strike cannot satisfy the positive latching requirement on a fire door. A fail-safe electrified mortise lock maintains positive latching (latch bolt always projects) while providing fail-safe lever release (outside lever unlocks when power is removed on fire alarm). Browse Schlage L Series electrified mortise lock parts for stairwell applications.

For pre-order application guidance and product selection support, contact the SecurityParts.com team at 845-935-0301 or the SecurityParts.com contact page. Browse Von Duprin electrified hardware parts and the Schlage commercial hardware catalog at Security Parts.

Why Choose Security Parts for Electrified Door Hardware Parts

Sideload failure mechanism, HVAC pressure differential context, solenoid heat vs motor efficiency, fire door fail-safe prohibition, auto operator exception, and same-day OEM shipping.

Sideload Failure Root Cause

We document the specific mechanism by which HVAC pressure differentials cause electric strike sideload failures. This is the most common unexplained field complaint in access control and is not documented at the parts ordering level by any competitor.

Solenoid vs Motor Efficiency

We document the solenoid heat and continuous holding current problem in electric strikes and why motor-driven electrified mortise locks run cooler and use less power in always-on configurations. This affects power supply sizing and long-term energy cost.

Fire Door Fail-Safe Prohibition

We document why fail-safe electric strikes cannot satisfy fire door positive latching requirements and why fail-safe electrified mortise locks can, because positive latching in the mortise lock is independent of the electrical state.

Same-Day OEM Shipping

Von Duprin electric strike parts and Schlage electrified mortise lock parts ship same day from US warehouses. Call 845-935-0301 or the contact page for application support before ordering.

What Makes Security Parts Different for Electrified Hardware Parts

We document the HVAC pressure differential as the primary cause of electric strike sideload failures in large commercial buildings. This is the mechanism behind the most common "strike not releasing" field complaint and is not documented by any competitor at the parts ordering level.
We document that fail-safe electric strikes are prohibited on fire-rated doors because positive latching is lost when the keeper releases, while fail-safe electrified mortise locks maintain positive latching in the fail-safe state because latch bolt projection is independent of lever electrical state. This distinction determines code compliance on fire-rated stairwell reentry doors.
We document the 1886 Rousseau patent history of the electric strike and why its fundamental design (frame-side release) has not changed in nearly 140 years, making it legacy technology that has specific limitations newer electrified lock designs address.
We document the monitoring integration advantage: an electrified mortise lock reduces three separate monitoring devices (RX, DPS, and lever monitor) to a single integrated device, reducing conduit runs, work boxes, and panel programming on large monitored projects.
We carry Von Duprin electric strike parts, Schlage L Series electrified mortise lock parts, and Schlage ND Series electrified cylindrical lock parts for both technology types in one order at SecurityParts.com.
Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. 30-plus years of commercial door hardware experience.

Frequently Asked Questions: Electrified Mortise Lock vs Electric Strike

What is the fundamental difference between an electric strike and an electrified mortise lock?

An electric strike replaces the strike plate in the door frame and releases the latch keeper on a credential signal. The lock on the door stays mechanical. An electrified mortise lock replaces the lock body inside the door and controls whether the outside lever can turn. Both allow electronic access control. The difference is location: frame-side release (electric strike) vs door-side lever control (electrified mortise lock). The electrified mortise lock is more secure, releases reliably under sideload pressure, and integrates monitoring in one device. The electric strike is lower cost, easier to retrofit, and correct for automatic operator applications.

Why do electric strikes sometimes fail to release when pushed against?

Electric strikes fail under sideload pressure: force from HVAC pressure differentials, misaligned frames, or weatherstripping that pushes the door against the frame compresses the latch bolt against the keeper face. When the solenoid activates, the friction load prevents the keeper from moving freely. The occupant must pull the door slightly to relieve pressure before it opens. Electrified mortise locks retract the latch internally via lever rotation, independent of any frame-side pressure, eliminating this failure mode entirely.

Can an electric strike be used on a fire-rated door?

A fail-secure electric strike can be used on a fire-rated door because it maintains positive latching when power is removed. A fail-safe electric strike cannot be used on a fire-rated door because it releases the keeper when power is cut, eliminating positive latching and violating NFPA 80. For stairwell reentry doors that require fail-safe operation on fire alarm, the correct hardware is fail-safe electrified lever trim for fire exit hardware or a fail-safe electrified mortise lock, not a fail-safe electric strike.

What is the tolerance slop problem when using electric strikes with mortise locks?

Electric strikes must accommodate latch bolts from many manufacturers. The center-line position of the mortise lock latch bolt varies between manufacturers, requiring oversized keeper openings or filler plates. The resulting fit has slightly more play than a matched lock and strike from the same manufacturer. In high-security applications requiring firm door hold against push-test, this slop is unacceptable. Electrified mortise locks use matched components with precise tolerances, eliminating the slop.

Why is the automatic door operator application the best use case for an electric strike?

Automatic door operators swing the door open on a motorized arm. To open the door, the latch must first be released. An electric strike releases the latch at the frame, allowing the door to swing freely without lever operation. An electrified mortise or cylindrical lock cannot be used with an automatic operator because the operator cannot turn the lever to retract the latch before swinging. This is the one application where the electric strike is clearly the correct and only practical choice.

What wiring is required for an electrified mortise lock that is not required for an electric strike?

An electric strike requires wiring only in the door frame with nothing crossing to the door. An electrified mortise lock installs inside the door and requires power to cross from frame to door. Three standard methods: an electrified hinge (cleanest, conductive elements in the hinge knuckle, invisible in installed condition), an Electric Power Transfer device (EPT, surface-mounted flexible loop at door top, compatible with any standard hinge), or surface conduit along the door edge (most visible, used in utility applications). The electrified hinge is the most architecturally seamless solution but requires ordering the correct hinge for door size and weight.

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Von Duprin 9847 Exit Device Parts: Complete CVR Guide for Replacement and Identification Tuesday, July 28, 2026

The Von Duprin 9847 exit device appears in institutional buildings, hospitals, schools, and commercial facilities across North America. Because it is part of the long-running 98/99 series, devices installed decades ago still accept current replacement parts in most cases. The challenge is knowing which parts apply to which variant, and what the model number on the door tells you before you order.

This guide covers everything needed to identify, order, and service Von Duprin 9847 exit device parts: the CVR configurations, the most common failure parts, the 9847 vs 9947 model number difference, fire vs panic device compatibility, the WDC wood door variant, and the electrified upgrade options available on this device family. Browse the Von Duprin exit devices catalog or the Von Duprin brand parts page at SecurityParts.com. Call 845-935-0301 or visit the SecurityParts.com contact page for pre-order parts identification support.

What Is the Von Duprin 9847 Exit Device and Where Is It Used

The Von Duprin 9847 exit device is a concealed vertical rod exit device. It belongs to the 98/99 series, which is the institutional flagship exit device line from Allegion. The CVR configuration uses vertical rods that run inside the door stile, engaging a top latch at the door head and a bottom latch at the door threshold when the push bar is activated. Because the rods are concealed inside the door, no hardware is visible on the door face except the push bar itself and the latch bolts at the top and bottom edges.

This configuration makes the 9847 the specification of choice in three situations: double doors without a center mullion that require three-point locking, architectural environments where surface rod hardware is visually unacceptable, and hotel or healthcare reception areas where door face appearance is a design requirement.

The 9847 CVR is available in panic and fire exit hardware versions. The panic version (model 9847) supports cylinder dogging and hex dogging options. The fire version (model 9847-F) must positively latch on every door cycle and does not support any dogging. ANSI/BHMA A156.3 Grade 1 certification applies to the full 98/99 series including the 9847 configuration.

Von Duprin 98/99 Series exit device family: the 9847 CVR is part of this series. Browse the complete 98/99 series parts catalog at SecurityParts.com.

Von Duprin 9847 vs 9947: Understanding the Model Number Difference

This is the most common source of confusion when ordering parts for a CVR exit device. The 9847 and 9947 are not two different products. They are two model number designations for the same concealed vertical rod configuration within the 98/99 series.

The 9847 designation was used on devices manufactured up through the mid-to-late 1990s. The 9947 is the current designation in active production. The physical device, its rod hardware, latch assemblies, and mechanism case are functionally identical between the two designations. Allegion consolidated the naming when the series was updated.

What the prefix tells you is a separate matter entirely. The 98-prefix (as in 9847) indicates a smooth mechanism case. The 99-prefix (as in 9947) indicates a grooved mechanism case. Both use the same internal parts. The grooved case on the 99 series provides better grip surface on high-contact institutional openings, which is why healthcare and educational specifications often call for the 99 specifically.

The manufacture date matters more than the model number for dogging parts: A Von Duprin CVR device with model number 9847 or 9947 manufactured before August 1997 uses an older-style dogging assembly that requires a different replacement kit than current-production parts. If the manufacture date stamp on the device shows a date before August 1997, use the old-style hex dogging replacement kit (part 050153) rather than current dogging shaft part 090040. For devices manufactured after August 1997, current-specification dogging parts apply regardless of whether the label reads 9847 or 9947.

How to Read the Von Duprin 9847 Model Number on the Device

The model number on a Von Duprin 9847 CVR exit device appears on a label near the mechanism case housing on the hinge side of the device body. The label typically shows the full model designation including configuration suffix: 9847, 9847-F, 9947, or 9947-F. On some older devices the label has worn, in which case the device configuration can be determined by the hardware visible at the door head and threshold.

The suffix tells you which replacement parts apply to the latch assemblies. The -F suffix means fire exit hardware. Without -F means panic hardware. This distinction changes which latch mounting bracket quantity is required per latch and whether dogging components are applicable at all.

Von Duprin 9847 CVR Configurations

The 9847 concealed vertical rod exit device is available in several configurations that affect which rod components, latch kits, and mounting hardware apply to your installation.

9847 Standard Metal Door

Door type: Standard hollow metal or steel door

Rod type: Adjustable vertical rods inside door stile

Top rod part: 050574 (standard door height)

Bottom rod part: 050575

Latch bracket screw: Part 090061

The standard metal door configuration is the most common 9847 installation. Both rods run inside the door stile and are accessible for adjustment through the door preparation holes.

9847WDC Wood Door Concealed

Door type: Wood doors with CVR door preparation

Rod type: Different rod kits than metal door version

Top rod part: 050582 (WDC-specific)

Bottom rod part: 050583 (WDC-specific)

Latch bracket screw: Part 900856 (WDC mounting pkg)

The WDC variant uses dedicated rod kits. Never order metal door rod parts for a WDC installation. The door preparation dimensions differ and the rod kits are not interchangeable.

9847-F Fire Exit Hardware

Suffix: -F indicates fire exit hardware

Dogging: Not permitted on fire devices

Latch brackets: Two per latch (panic uses one)

Center case cover: Different part number from panic version

Fire devices must positively latch on every door close. The latch mounting bracket count per latch is doubled on the fire version. Confirm -F or non-F status before ordering any latch kits or center case components.

CD9847 Cylinder Dogging

Option: Cylinder dogging on panic version only

Function: Mortise cylinder controls dogging

Additional parts: CD dogging plug (090046), CD actuator arm (090045)

Not available: On fire-rated 9847-F devices

Cylinder dogging allows a mortise cylinder key to lock the push bar in the depressed position during business hours. The cylinder mounting package (107813) is required when adding or replacing CD components.

LBR (Less Bottom Rod) fire devices require a separate latch kit: The 9847-F LBR configuration omits the bottom rod assembly and uses a spring-loaded floor latch instead. This configuration uses a different fire latch kit from the standard 9847-F. Confirm whether the device is standard or LBR before ordering any bottom latch or rod components on a fire-rated device.

Von Duprin 9847 Parts: Most Common Replacements

These are the components that fail most frequently on the Von Duprin 9847 CVR exit device based on field replacement patterns. Every part number below applies to both the 9847 and 9947 designations on devices manufactured after August 1997.

Latch Assemblies

The top and bottom latch kits are the most frequently replaced components on CVR exit devices. They wear at the pivot points and at the latch bolt face on high-cycle openings. Latch kits are sold separately for top and bottom, and the quantity of latch mounting brackets required differs between panic and fire devices.

050492

Top Latch Kit Replaces the top latch assembly at the door head. Includes latch bolt, case, and mounting components. Used on both panic and fire 9847 devices. Fire device uses two latch mounting brackets per latch; panic uses one.

Panic and fire

050493

Bottom Latch Kit Replaces the bottom latch assembly at the door threshold. Does not apply to LBR (Less Bottom Rod) fire devices, which use a separate fire latch kit.

Panic and fire (not LBR)

109324

Latch Mounting Bracket Mounts the latch case to the door preparation. Panic device: 1 per latch (2 total). Fire device: 2 per latch (4 total). Confirm device type before ordering quantity.

Qty varies by type

050047

9848 Latch Retrofit Kit (non-EL) Converts the original 9847/9947 latch design to the updated 9848 latch system. Includes items equivalent to the top and bottom latch kits plus one mounting bracket per latch. For service replacement on devices where individual latch components are no longer available separately.

Panic only (non-EL)

Rod Assemblies

The adjustable vertical rods are the structural element that transmits push bar activation to the top and bottom latches. Rods bend or deform on high-abuse applications. The top rod is adjustable for door height; the bottom rod kit includes the adjustment hardware for threshold clearance.

050574

Adjustable Top Rod (Metal Door, Standard Height) For metal door 9847 installations up to 8-foot 4-inch door height. Adjust before hanging the door to set correct latch bolt engagement.

Metal door only

050575

Adjustable Bottom Rod Kit (Metal Door) Includes adjustable rod and adjustment hardware. Bottom rod adjustment sets the clearance between the bottom latch bolt and the floor.

Metal door only

050582

WDC Adjustable Top Rod (Wood Door) Wood door concealed variant only. Not interchangeable with metal door rod 050574.

WDC only

050583

WDC Adjustable Bottom Rod Kit (Wood Door) Wood door concealed variant only. Not interchangeable with metal door rod kit 050575.

WDC only

Baseplate and Dogging Assembly

The baseplate assembly contains the dogging components that hold the push bar depressed during business hours. These parts wear most quickly on high-traffic doors with frequent dogging use.

090040

Hex Dogging Shaft (Pack of 2) The most commonly replaced dogging component. Strips under repeated use with an improperly seated hex key. For devices manufactured after August 1997. Pre-1997 devices require old-style shaft 968112.

Post-1997 only

090042

Dogging Adapter Spring (Pack of 2) Locks the dogging adapter into the mounting bracket. Fatigue failure on high-cycle doors.

Panic only

090043

Dogging Adapter (Pack of 2) The housing the dogging shaft and spring fit through. Cracks under impact. Inspect whenever shaft replacement is performed.

Panic only

090039

Latch Return Spring (Pack of 10) Returns the latch to the engaged position after the push bar is released. Fatigue failure on very high-cycle doors.

All configurations

Springs and Pins

090064

Latch Link Pin (Pack of 10) Connects the latch link to the latch case. Wears at the pin bore on high-cycle installations.

Both latches

090065

Bolt Return Spring (Pack of 10) Keeps the latch bolt in the extended (latched) position.

Both latches

090066

Top Latch Compression Spring (Pack of 10) Applies closing force to the top latch bolt. Fatigue failure appears as top latch that does not fully extend.

Top latch only

090069

Ratchet Lever Spring (Pack of 2) Part of the ratchet release assembly that allows latch adjustment.

Both configurations

090062

Bottom Latch Case Spirol Pin (Pack of 10) Retains the bottom latch components within the latch case.

Bottom latch

How to Order Von Duprin 9847 Parts Without a Return

Three pieces of information are required before placing any 9847 CVR parts order. Getting any one of these wrong produces a part that does not fit the installed device.

Confirm panic or fire exit hardware The -F suffix in the model number confirms fire exit hardware. Without -F is panic. This determines latch mounting bracket quantities (one per latch for panic, two per latch for fire), whether dogging parts apply, and which center case cover kit is correct.
Confirm metal door or WDC WDC is wood door concealed. If the device is in a wood door, rod kits 050582 and 050583 apply. For metal door installations, 050574 and 050575 apply. These rod kits are not interchangeable.
Check the manufacture date for dogging parts The manufacture date appears near the model number on the device label. For devices manufactured before August 1997, order old-style dogging replacement kit 050153. For post-1997 devices, current-spec parts 090040, 090042, and 090043 apply.
Confirm whether the device has CD cylinder dogging Cylinder dogging adds a mortise cylinder to the device body. If the device has a cylinder slot at the mechanism case, it is a CD variant and the dogging plug (090046) and CD actuator arm (090045) are present in the assembly. Non-CD devices do not have these components.
Verify door width (3-foot or 4-foot device) The push bar retrofit kit (PBKIT) and some mechanism case components are device-size specific. A 3-foot device uses different PBKIT from a 4-foot device. Measure the door width before ordering any push bar or mechanism case components.

Call 845-935-0301 before ordering latch kits on an older device: On Von Duprin 9847 devices where the original latch design is worn beyond individual component replacement, the latch retrofit kits (050047 for panic, 050048 for fire, non-EL) convert the original 9847/9947 latch to the updated 9948 latch system. SecurityParts.com can confirm which retrofit kit applies to your specific device before the order ships.

Electric Latch Retraction Options on the Von Duprin 9847

The Von Duprin 9847 CVR exit device supports electric latch retraction (EL) and hex dogging with electric latch retraction (HD-EL) as field-installable additions. These options convert a mechanical 9847 device to provide remote latch retraction capability, allowing an access control system to release the latch without anyone pressing the push bar.

EL is available on panic versions only. It is not available on fire-rated 9847-F devices. When an EL-equipped 9847 receives a credential signal, a solenoid retracts the CVR latches simultaneously, releasing the door. The HD-EL version adds hex dogging capability to the electrified device, allowing the push bar to be dogged in the depressed position independently of the EL function.

The EL9847 and HD-EL9847 designations identify electrically modified versions of the original 9847 model. The current EL kit adds a solenoid module to the existing mechanical device without requiring replacement of the device body. For access control integration on 9847 CVR devices, browse Von Duprin electric strike parts for the frame-side components that work alongside EL-equipped exit devices, and see the Von Duprin QEL vs MEL guide for a comparison of electric latch retraction options across the 98/99 series.

The RX (request to exit) switch option is also available on the 9847 series. RX places a switch in the push bar that signals the access control panel when egress is initiated, preventing false alarms on the secured entry side. The LX (latch bolt monitor) option signals the panel when the latch is not properly engaged, which is required on fire doors with latch compliance monitoring under the inspection program.

CVR vs Rim vs SVR: Where the 9847 Fits in the Von Duprin Lineup

Understanding which configuration applies to your opening prevents ordering the wrong device series entirely. The three main configurations in the 98/99 series serve different door types and architectural situations.

The rim device (98 and 99 series) mounts on the door face and latches at a single frame-side strike. It is the most common configuration for single doors and paired doors with a center mullion. For a complete guide to rim exit device components and configurations, see the rim exit devices guide at SecurityParts.com.

The surface vertical rod (SVR) device uses top and bottom engagement rods that run on the door face, providing three-point locking for double doors without a center mullion. Unlike the CVR, the SVR rods are visible on the door face. The SVR is specified where concealed rods are not required but three-point locking is still needed.

The concealed vertical rod (CVR) device, which is the 9847/9947, hides the rods inside the door stile. It is the architectural choice for double doors where surface rod hardware is not acceptable and three-point locking is required. For a broader overview of the full Von Duprin series and which configuration fits which application, see the Von Duprin exit device series comparison.

Von Duprin 22 Series rim exit device: the rim configuration for single doors and mullion pairs. The 9847 CVR is used when surface rods are not acceptable and concealed vertical rod hardware is required. Browse the 22 Series parts catalog at SecurityParts.com.

NFPA 80 and Code Compliance on the Von Duprin 9847 Fire Device

The Von Duprin 9847-F fire exit hardware version must meet specific requirements under NFPA 80 that go beyond what applies to the panic version of the same device. Facility managers and locksmiths maintaining fire-rated CVR devices need to understand these requirements before performing any maintenance or parts replacement.

Positive Latching on Every Cycle

A fire-rated 9847-F device must positively latch at both the top and bottom strike on every door close, without assistance. After replacing any latch component on a fire device, test the door by releasing it from fully open without pushing or assisting the close. Both latch bolts must engage the strike fully. A top or bottom latch that does not fully engage after parts replacement is a NFPA 80 deficiency.

No Dogging on Fire Devices

NFPA 80 Section 4.7.1 prohibits any device that holds a fire door open in a manner not connected to the fire alarm system. Mechanical dogging, including hex dogging and cylinder dogging, cannot be installed on a fire-rated 9847-F device. If a 9847-F device in your facility has a hex dogging mechanism installed, it is a fire code violation that will be cited on the next NFPA 80 annual fire door inspection. For general guidance on commercial door hardware and code compliance, see the panic hardware for commercial doors guide.

Parts Replacement and UL Listing Integrity

Only OEM replacement parts maintain the UL fire listing on the 9847-F device. Aftermarket latch kits, rod assemblies, or center case components installed on a fire-rated device can void the UL listing and create liability on the next fire door inspection. For the full case for OEM parts on fire-rated hardware, see the OEM vs aftermarket commercial door hardware parts guide.

Why Choose SecurityParts.com for Von Duprin 9847 Exit Device Parts

SecurityParts.com has supplied commercial door hardware parts since 2001. The Von Duprin catalog at SecurityParts.com covers the complete 98/99 series including the 9847 CVR configuration, with OEM replacement parts and same-day shipping from US warehouses.

9847 vs 9947 parts compatibility documented: We explain which parts apply across the 9847 and 9947 designations and where the manufacture date creates a difference in dogging component compatibility.
Panic vs fire parts clearly separated: We document the latch bracket quantity difference between panic and fire devices so you order the right quantity the first time.
Metal door vs WDC rod kits differentiated: We identify which rod kits apply to standard metal door CVR installations and which apply to the WDC wood door concealed variant.
Pre-order support by device configuration: Call 845-935-0301 to confirm which parts apply to your specific 9847 device before the order ships.
OEM parts for fire-rated devices: All Von Duprin replacement parts stocked at SecurityParts.com are OEM, maintaining UL fire listing integrity on fire-rated CVR devices.

Browse the Von Duprin 98/99 series parts catalog and the complete exit devices and Von Duprin replacement parts catalogs at SecurityParts.com. Free shipping on orders $300 and over. Same-day shipping on stocked OEM parts. Call 845-935-0301 for finish matching and parts confirmation.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM commercial door hardware parts since 2001. The team provides parts identification and pre-order compatibility support for Von Duprin exit devices, cylindrical locks, mortise locks, and door closers across commercial, institutional, and healthcare facilities. For Von Duprin 9847 CVR parts identification and same-day shipping support. Call 845-935-0301 for parts identification support.

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Thumbturn Cylinder Guide: What It Is, How It Works, and When to Use It Monday, July 27, 2026

A thumbturn cylinder is one of the most commonly specified components in commercial door hardware, yet it is one of the least explained. This guide covers what a thumbturn cylinder is, how it works mechanically, how it differs from a double cylinder and a coin turn, how it functions within mortise lock ANSI function codes, when building codes restrict its use on glazed openings, and how to identify a thumbturn cylinder that needs service or replacement.

SecurityParts.com stocks commercial deadbolts and mortise locks equipped with thumbturn cylinders across multiple Schlage product lines. Browse the commercial deadbolts catalog, the commercial mortise locks catalog, and the complete Schlage hardware parts catalog. For parts identification, call 845-935-0301 or visit the SecurityParts.com contact page.

What Is a Thumbturn Cylinder?

A thumbturn cylinder is the interior actuator component on a single-cylinder deadbolt or mortise lock that allows the occupant to operate the deadbolt from the inside without a key. The user grips a small wing- or oval-shaped knob, called the thumbturn, and rotates it to throw or retract the deadbolt. On the exterior side of the door, a standard keyed cylinder provides key-controlled entry.

The term "thumbturn cylinder" describes the complete interior assembly including the thumbturn knob, the housing or escutcheon that holds it, and the internal tailpiece or cam that transmits rotation to the lock mechanism. In deadbolt hardware, this interior assembly is a separate component from the exterior key cylinder. In mortise locks, both the exterior key cylinder and the interior thumbturn are independent components that mount into the mortise case from the door face.

Schlage commercial deadbolts and mortise locks with thumbturn cylinder configurations at SecurityParts.com

How a Thumbturn Cylinder Works

Inside the deadbolt or mortise lock case, a cam or tailpiece extends from the back of the lock cylinder. When the keyed exterior cylinder is turned with a key, the cam rotates and drives the deadbolt mechanism. When the thumbturn interior cylinder is rotated by hand, the same mechanism is driven from the opposite side through a separate internal linkage.

The thumbturn and exterior key cylinder are mechanically independent. Turning the thumbturn does not affect the exterior cylinder, and vice versa. This independent operation is what makes the single-cylinder configuration the standard for most commercial interior and exterior openings: occupants can lock or unlock from the inside at any time, while outside entry always requires a key.

How the Thumbturn Cylinder Differs From the Key Cylinder

A key cylinder requires a correctly cut key to operate. A thumbturn cylinder requires only a hand. The two components occupy the same position in the lock assembly but on opposite sides of the door. In most single-cylinder deadbolts, the key cylinder sits on the exterior rose or escutcheon and the thumbturn sits on the interior rose or escutcheon. In mortise locks, both cylinders thread into the mortise case body and are held in place by set screws.

The cam or tailpiece on the back of a thumbturn cylinder is typically identical to the cam on the key cylinder it pairs with. Both engage the same internal mechanism from their respective sides. The difference is only in how the operator interface works: cut-key versus hand rotation.

Single Cylinder vs Double Cylinder: When to Use Each

The choice between a single-cylinder deadbolt (thumbturn inside, key outside) and a double-cylinder deadbolt (key on both sides) is one of the most consequential decisions in commercial door hardware specification. Getting it wrong creates either a security vulnerability or a life-safety hazard.

Single Cylinder (Thumbturn Inside)

Key outside, thumbturn inside

Interior operation: Thumbturn no key required for egress

Exterior operation: Keyed cylinder required for entry

IBC compliance: Required by IBC Section 1010 for most occupied spaces

Fire egress: Occupant can always exit without a key

Best for: Interior office doors, hotel room entry, storeroom, corridor doors, most commercial openings

Risk: Thumbturn can be operated through broken adjacent glass if within arm's reach

Double Cylinder (Key Both Sides)

Key outside and inside

Interior operation: Key required no thumbturn

Exterior operation: Keyed cylinder required for entry

IBC compliance: Permitted only on specific glass-adjacent openings per Section 1010.2.4

Fire egress: Occupant must have a key to exit significant life-safety concern

Best for: Glass-panel openings where thumbturn could be reached through broken glass

Risk: Occupant trapped inside during emergency if interior key is lost or unavailable

Double cylinder deadbolts create a life-safety risk on egress doors. If an occupant cannot locate the interior key during a fire or other emergency, a double-cylinder deadbolt prevents egress. IBC Section 1010 restricts double-cylinder use to specific conditions. Always confirm with the authority having jurisdiction before specifying double cylinder on any opening. The thumbturn configuration (single cylinder) is the correct default for occupied commercial spaces.

When IBC Section 1010 Permits Double Cylinder

IBC Section 1010.2.4 permits a double-cylinder deadbolt specifically when the opening is located within 40 inches of a panel of glass that could be broken to reach the interior thumbturn. The reasoning is that a thumbturn in that position creates a reach-through vulnerability: an intruder breaks the adjacent glass, extends an arm through the opening, and rotates the thumbturn to unlock the door from the outside.

Even when double cylinder is permitted, the authority having jurisdiction must approve the specification. The interior key must be kept immediately accessible to occupants, typically on a hook adjacent to the door. Double cylinder is never appropriate on a fire-rated egress door without specific approval from the local fire marshal, because NFPA 80 requires that fire doors open freely for egress.

The Reach-Through Risk and How to Mitigate It

The reach-through security risk applies when a thumbturn cylinder is installed on a door with breakable glass within arm's reach of the interior thumbturn. The four commercial mitigation strategies, in order of frequency of use, are:

Double-cylinder deadbolt on openings where IBC and the AHJ permit it, with interior key maintained accessible
Impact-resistant or laminated security glazing that holds together when struck and prevents arm entry through the opening
Electronic access control replacing the deadbolt entirely so the interior device is a push-button or request-to-exit switch, not a thumbturn
Relocating the lock to a position on the door or frame that is not reachable through the adjacent glass

Thumbturn Cylinder vs Coin Turn: Which to Specify

Schlage L Series mortise lock supports both thumbturn and coin turn interior cylinder configurations

A thumbturn and a coin turn perform the same mechanical function inside the deadbolt or mortise lock. The difference is entirely in how the user interface works. A thumbturn rotates easily with two fingers. A coin turn is a flat disc with a slotted face that requires a coin, a flathead screwdriver, or a proprietary tool to operate.

When to Specify a Coin Turn

Coin turns are specified in commercial and institutional settings where staff-only interior control is required without issuing keys to every occupant. The tool-requirement limits who can operate the lock from the inside without authorization. Common applications include:

Patient room doors in behavioral health and psychiatric facilities where a patient operating a thumbturn from the inside without staff knowledge creates a safety concern
Storeroom and secure-area doors where staff need to lock a door from the inside temporarily without issuing a key to every person who uses the room
Accessible toilet room privacy locks in healthcare facilities, replacing a standard thumbturn to prevent patients from accidentally locking themselves in
Server room and IT room doors where the interior control should require a deliberate tool-assisted operation rather than a casual thumbturn rotation

Coin Turn in the Mortise Lock Function Code

On Schlage L Series and other commercial mortise locks, the coin turn is available as an alternative to the thumbturn on specific function codes. In function codes where the interior cylinder controls the deadbolt or locks the outside trim, a coin turn can be specified in place of a thumbturn. The mortise case mechanism is identical. Only the interior interface component changes. Specify the coin turn at the hardware schedule stage, before the lock body is ordered, because field-converting a thumbturn mortise to a coin turn configuration requires the correct interior trim components for that specific function code.

Thumbturn Cylinder in Commercial Mortise Lock Function Codes

In commercial mortise locks, the thumbturn cylinder does not always perform the same function. The ANSI function code determines exactly what the thumbturn controls at each opening. Understanding this is essential for correct specification, because the wrong function code produces the wrong door behavior regardless of how the thumbturn itself is installed.

Schlage MA Series commercial mortise lock at SecurityParts.com available in ANSI function codes with thumbturn interior cylinder

F02
PrivacyThumbturn throws and retracts the deadbolt from inside. Outside has emergency release only. Used on restrooms, single-occupancy offices, dressing rooms.
F04
Entrance / OfficeThumbturn locks or unlocks the outside lever trim from the inside without a key. Inside lever always free. Used on office suite entry doors, retail entry doors.
F09
ApartmentKey inside required to control outside trim. Inside lever always free for egress. Thumbturn not the standard actuator coin turn or key cylinder inside. Used on apartment and dormitory entry doors.
F13
Hotel / ApartmentInside lever controls both deadbolt and latch. Thumbturn on the keyed side shows an occupied indicator. Outside always requires key. Used on hotel rooms, dormitories.
F15
Hotel / MotelThumbturn controls deadbolt from inside with occupied indicator visible from outside. Outside lever always key-operated. Used on hotel and motel room doors where room status needs to be visible from the corridor.
F07
StoreroomNo thumbturn on interior inside lever always free for egress, outside lever always locked and requires key. Used on storage rooms, server rooms, mechanical rooms.

The function code determines what the thumbturn controls, not the thumbturn component itself. Ordering a mortise lock with a thumbturn interior trim does not automatically produce a specific door behavior. The ANSI function code in the lock body sets the behavior. A thumbturn on F02 operates the deadbolt only. A thumbturn on F04 locks and unlocks the outside lever. Confirm the function code matches the intended door behavior before ordering.

For a complete guide to Schlage L Series mortise lock parts and function diagrams, see the Schlage L Series mortise lock parts diagrams. For mortise lock parts identification across all models, see the commercial mortise lock parts guide at SecurityParts.com.

Thumbturn Cylinder in Commercial Deadbolts

In commercial deadbolts, the thumbturn cylinder has a simpler and more consistent role than in mortise locks. The thumbturn throws or retracts the deadbolt. That is its only function. The exterior key cylinder performs the same operation from the outside. Together, the two cylinders give the occupant and the authorized key-holder independent control over the same bolt.

Schlage B Series Deadbolts and Thumbturn Cylinder Options

The Schlage B Series is the most widely specified single-cylinder commercial deadbolt line in the United States. Every single-cylinder model in the B Series includes a thumbturn on the interior side. The thumbturn on B Series deadbolts is a fixed-wing style that rotates 90 degrees to throw or retract the 1-inch deadbolt. The thumbturn assembly is part of the interior rose and tailpiece assembly.

Single-cylinder B Series models include the B250, B350, B360, B460, and related configurations. Double-cylinder models (no thumbturn, key on both sides) include the B252, B352, and related double-cylinder configurations. When ordering Schlage B Series hardware, confirm the correct configuration by identifying whether the model number suffix indicates single cylinder or double cylinder.

For complete parts identification on Schlage B Series deadbolts including thumbturn assemblies, interior roses, and tailpieces, see the Schlage B Series deadbolt parts guide. For visual component identification, see the Schlage deadbolt diagram. Browse the complete commercial deadbolts catalog at SecurityParts.com.

Thumbturn Cylinder in Cylindrical Locks

Cylindrical locks generally do not include a standalone thumbturn cylinder. The interior actuator on cylindrical privacy locks is a push-button or turn-button integrated into the interior lever or knob escutcheon. This is mechanically different from the thumbturn assembly found on deadbolts and mortise locks. In cylindrical lock terminology, the interior button activates a locking pin inside the lock body, not a separate cylinder cam. The thumbturn configuration in the commercial hardware context specifically refers to the mortise cylinder or deadbolt configuration, not the interior button on a cylindrical lock.

For cylindrical lock parts including interior button assemblies and lever trim, see the cylindrical locks catalog at SecurityParts.com.

Thumbturn Cylinder in Exit Device Outside Trim

Exit devices (panic bars) can be specified with an outside trim cylinder that includes a thumbturn on the interior side of the trim plate. This configuration is less common than a standard keyed outside trim, but it is specified on openings where the door must be locked and unlocked from the inside without a key, while still requiring a key for outside entry.

On Von Duprin and Falcon exit devices, outside trim options include rim cylinders, mortise cylinders, and thumbturn-equipped trim plates for specific functions. The thumbturn in this context operates the exit device's outside trim mechanism, not the push bar or latch retraction. The push bar always operates freely for egress regardless of how the outside trim is configured.

For Von Duprin exit device trim options and outside cylinder configurations, see the Von Duprin parts and series catalog. For Falcon exit device trim options, see the Falcon hardware catalog at SecurityParts.com.

How to Identify a Thumbturn Cylinder That Needs Service or Replacement

Thumbturn cylinders fail gradually in most cases, giving identifiable symptoms before they stop functioning entirely. Identifying the failure mode determines whether the fix is lubrication, adjustment, or replacement.

Thumbturn is stiff and requires significant force
Worn internal components, corrosion inside the cylinder, or door misalignment putting lateral stress on the thumbturn assembly. Try dry graphite or dry PTFE lubricant first. If stiffness persists, check door alignment before replacing the thumbturn.
Thumbturn rotates but bolt does not move consistently
Worn or damaged cam or tailpiece connection between the thumbturn cylinder and the bolt mechanism. The cam has lost its positive engagement with the lock mechanism. Replace the thumbturn assembly or the cam.
Thumbturn spins freely with no resistance
Stripped cam, broken tailpiece, or disconnected internal linkage. The thumbturn is completely disengaged from the bolt mechanism. Replacement of the thumbturn assembly or the complete interior cylinder is required.
Thumbturn requires more than one full rotation to move the bolt
Cam slippage or worn spline engagement between the thumbturn and the lock spindle. The cam is no longer positively keying to the spindle and is rotating past the engagement point before driving the bolt.
Thumbturn is loose and wiggles laterally
Loose mounting screws on the interior rose or escutcheon, or a worn interior spindle bearing. Tighten the interior rose screws first. If looseness persists after tightening, the interior housing has worn and the assembly needs replacement.

Lubricate thumbturn cylinders with dry products only. Petroleum-based lubricants including WD-40 dissolve the grease that lubricates the cylinder pins and attract dust and metal particles, forming an abrasive compound inside the cylinder. Use dry graphite powder or dry PTFE spray for thumbturn cylinder lubrication. Apply to the cam interface and the interior of the cylinder housing, not the thumbturn face itself.

Thumbturn Cylinder Maintenance Best Practices

A thumbturn cylinder in a well-maintained commercial lock should operate smoothly for the full cycle life of the lock body. Most thumbturn failures on high-cycle commercial openings are caused by deferred maintenance rather than inherent component wear. Incorporating thumbturn inspection into the standard door hardware maintenance schedule prevents the majority of field failures.

Test the thumbturn operation at every scheduled hardware inspection. Rotate through the full throw and retract arc and note any stiffness, inconsistency, or looseness. Catching early wear symptoms prevents a complete failure that leaves a door unable to lock.
Inspect the cam engagement by removing the interior rose and observing the cam on the back of the thumbturn cylinder. The cam should engage the lock mechanism positively with no slippage at the start of rotation. A cam that requires significant rotation before engaging is worn.
Check the interior rose screws for tightness at every inspection. Loose rose screws allow the interior housing to shift, which changes the cam alignment and eventually produces thumbturn slippage symptoms.
On exterior-facing doors and doors in high-humidity environments such as laundry rooms, pool areas, and food service kitchens, increase inspection frequency. Moisture accelerates corrosion inside the thumbturn cylinder housing and at the cam interface.
On high-traffic commercial openings, thumbturn cylinder service life is typically 5 to 10 years depending on traffic volume and maintenance frequency. Plan for proactive replacement rather than waiting for failure on any door that cannot be taken out of service quickly.

For a complete commercial door hardware maintenance schedule covering all hardware categories including deadbolts and mortise locks, see the commercial door hardware maintenance checklist at SecurityParts.com. For parts identification on deadbolts and mortise locks, see the deadbolt parts guide and the mortise lock parts guide.

Why Choose SecurityParts.com for Commercial Deadbolt and Mortise Lock Parts

SecurityParts.com has supplied commercial door hardware parts since 2001. The Schlage hardware catalog at SecurityParts.com covers the complete B Series deadbolt line with single-cylinder thumbturn and double-cylinder configurations, the Schlage L Series commercial mortise lock with every standard ANSI function code and interior cylinder option, and the Schlage MA Series and supporting product lines. Every product page includes an interactive parts diagram so you can identify the specific thumbturn assembly, interior rose, tailpiece, or cam needed before placing the order.

Browse the commercial deadbolts catalog, the commercial mortise locks catalog, the complete Schlage hardware parts catalog, the Schlage B Series deadbolt parts guide, and the Schlage L Series mortise lock parts diagrams. Browse all SecurityParts.com commercial door hardware parts. Call 845-935-0301 or visit the SecurityParts.com contact page for parts identification and same-day shipping support.

This thumbturn cylinder guide is maintained by the commercial door hardware team at SecurityParts.com. For parts identification on Schlage deadbolts and mortise locks with thumbturn configurations, call 845-935-0301 or browse the commercial deadbolts catalog and the commercial mortise locks catalog at SecurityParts.com.

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Commercial Door Hardware Finish Guide: US3 to US32D, ANSI Codes and Corrosion Resistance Explained Monday, July 27, 2026

Commercial door hardware finishes use two parallel designation systems under ANSI/BHMA A156.18: legacy US codes (US3, US26D, US32D) and current BHMA three-digit codes (605, 626, 630). Both systems describe the same finishes. The most important technical distinction is between US26D/626 (satin chrome plated: corrosion resistance from a surface coating) and US32D/630 (satin stainless steel: corrosion resistance from the base material itself).

Finish codes appear on every hardware schedule and every product order. They determine whether replacement hardware matches existing hardware, whether the finish is appropriate for the environment, and whether the warranty is valid after installation. Ordering the wrong finish code produces a visible mismatch on the opening. Installing an interior-rated finish on an exterior application voids the manufacturer warranty. Getting finish selection right at the order stage prevents both problems.

Browse SecurityParts.com hardware by finish: Von Duprin exit devices in US32D, US26D, US28, and US10B; Schlage ND Series cylindrical locks in all standard finishes; Schlage L Series mortise locks by finish; LCN 4040XP closers in painted finish codes; and the complete Allegion hardware catalog. Call 845-935-0301 or visit the SecurityParts.com contact page for finish matching and 316-grade availability support.

How the US Finish Code and BHMA Code Systems Work Together

The ANSI/BHMA A156.18 standard governs materials and finishes for all commercial door hardware. It establishes finish code numbers, descriptions, base materials, and corrosion resistance test requirements. The standard maintains both the legacy US finish code system and the current BHMA three-digit system because both remain in active use throughout the industry.

Hardware schedules written by architects often use US codes because they are more descriptive and recognized by facility managers. Product catalogs from manufacturers typically list the BHMA three-digit code because it is the current ANSI-designated system. When a hardware schedule specifies US32D and a product catalog lists 630, they describe the same finish. Confirm which code system the manufacturer uses for that product line before ordering to avoid receiving the wrong finish. For a deeper look at how ANSI/BHMA standards govern all commercial hardware categories, see the ANSI/BHMA door hardware standards guide.

The Dual System Cross-Reference

Most major commercial finish codes map directly between the two systems. US26D equals BHMA 626. US32D equals BHMA 630. US3 equals BHMA 605. US10B equals BHMA 613. The letter suffix D in a US code indicates a satin (dull, brushed) texture. A code without a D suffix (US26, US32) indicates a bright (polished, mirror) texture. BHMA codes use separate code numbers for satin and bright versions rather than a letter suffix.

The BHMA 626 vs 652 distinction that causes finish mismatches on mixed hardware orders: BHMA 626 is satin chrome plated over a brass base. BHMA 652 is satin chrome plated over a steel base. Both are equivalent to US26D in appearance and produce a visually identical satin chrome finish. However, 626 and 652 are technically different because the base material differs. On a hardware schedule that specifies US26D for all hardware, products may arrive as either 626 or 652 from different manufacturers. In most interior applications this does not matter because the visible finish is identical. Where the base material affects fire listing compliance, confirm the specific BHMA code with the manufacturer before ordering.

US32D vs US26D: The Most Important Finish Decision in Commercial Hardware

This comparison drives more finish specification errors and more warranty denials than any other finish decision in commercial hardware. The two finishes appear visually similar at installation: both are brushed, silver-toned, and non-reflective. The operational difference is fundamental and determines whether the hardware lasts its full service life or fails early.

Factor

US26D / 626 (Satin Chrome)

US32D / 630 (Satin Stainless)

Base material

Brass or steel (non-stainless)

Stainless steel (304 standard)

Corrosion resistance source

Chrome plating layer on surface

Stainless steel base material throughout

When scratched

Exposes corrosion-prone base metal

Exposes stainless steel (still corrosion-resistant)

Harsh cleaning chemicals

Plating degrades with bleach and disinfectants

Resists bleach, quaternary ammonium, most cleaners

Exterior applications

Not suitable: plating fails outdoors

Standard exterior specification

Healthcare environments

Limited (low-chemical areas only)

Standard healthcare specification

Food service and kitchen

Not suitable: cleaning chemicals degrade plating

Standard food service specification

Standard interior (office, corridor)

Suitable: most economical option

Suitable: higher long-term performance

Approximate service life (interior)

10 to 15 years in controlled environments

20 years or longer in most environments

Manufacturer warranty (exterior)

Typically voided

Covered for standard exterior environments

The US26D exterior failure that is invisible at installation: US26D hardware installed on an exterior door looks identical to US32D at installation. The chrome plating has not yet shown any degradation. Failure develops over months as moisture infiltrates scratches in the plating, the underlying base metal corrodes, and the corrosion lifts and blisters surrounding plating. By the time the failure is visible, the hardware has been in the wrong environment long enough that the warranty period has typically passed. Finish selection for the correct environment is a specification-stage decision, not a field-verification decision.

Von Duprin 98/99 Series exit device: available in US32D (satin stainless), US26D (satin chrome), US28 (satin aluminum), and US10B (oil-rubbed bronze). Exterior and wet-area openings require US32D.

Complete Commercial Finish Reference: Every Major US and BHMA Code

US3 / 605Polished Brass

Interior Only

Bright mirror-polished brass on a brass base metal. The polished surface shows every fingerprint and surface scratch, requiring frequent cleaning to maintain appearance. Specified in high-end hospitality, historic renovation, and upscale multifamily lobby areas. Rarely used in standard institutional or commercial applications due to maintenance demands.

US4 / 606Satin Brass

Interior Only

Brushed satin finish on brass base metal. The satin texture hides fingerprints better than polished brass. Sometimes called brushed brass or satin antique brass. More common in hospitality and warm-toned multifamily environments than in institutional settings.

US10B / 613Oil-Rubbed Bronze (Living Finish)

Interior Only

Chemically darkened bronze or brass base metal to produce an intentionally aged appearance. Oil-rubbed bronze is the most commonly specified living finish in commercial hardware. High-contact surfaces like lever grips wear through the darkened treatment over time, exposing lighter bronze or brass beneath. This wear-through is intentional and expected: it is the defining characteristic of a living finish. Most manufacturers explicitly exclude living finish wear from their product warranties.

US26D / 626Satin Chrome Plated

Interior Only

Electroplated chrome layer over a brass or steel base metal, brushed to produce a satin (non-reflective) surface. The chrome plating is the source of both the finish appearance and the corrosion resistance. When the plating is scratched through, worn, or penetrated by harsh cleaning chemicals, the underlying base metal is exposed and begins to corrode. This is why US26D is rated for interior, dry, climate-controlled environments only. It is the best-selling commercial hardware finish overall due to its clean contemporary appearance and lower cost compared to US32D.

Schlage ND Series cylindrical lock: the standard interior commercial lock, available in US26D (satin chrome) for dry interior environments and US32D for wet areas and healthcare applications.

US28 / 628Satin Aluminum (Clear Coated)

InteriorExterior (non-coastal)

Anodized aluminum with a clear coat over the anodized surface. The anodizing process converts the aluminum surface to aluminum oxide, a hard layer integral to the metal itself, not a coating applied on top. Standard on Von Duprin exit devices in aluminum storefront door systems and on push-pull bars in aluminum frame applications. Suitable for exterior applications in most environments but not for coastal high-salt locations where anodized aluminum can develop white oxidation spots over extended exposure.

US32 / 629Bright (Polished) Stainless Steel

InteriorExterior

Mirror-polished surface on stainless steel base metal. Corrosion resistance is identical to US32D because the base material is the same 304 stainless. The polished surface shows fingerprints and surface scratches readily in high-touch applications. Specified for architectural applications where mirror-stainless aesthetics are required. Less common in standard commercial construction than US32D due to maintenance requirements.

US32D / 630Satin Stainless Steel

InteriorExteriorHealthcare / Food Service / Wet

Directionally brushed satin surface on 304 stainless steel base metal. No plating: the base material itself is stainless steel throughout. Corrosion resistance comes from the chromium content of the steel, not from a surface coating. Even when scratched, the underlying material is still stainless.

US32D is the most widely specified finish for exterior hardware, hospital and healthcare corridors, food service and kitchen environments, laboratories, and any application involving frequent cleaning with bleach, quaternary ammonium compounds, or other agents that degrade chrome plating. The satin texture hides fingerprints and minor surface scratches well. It is also the easiest finish to match across manufacturers because stainless steel appearance is inherent to the base material, not dependent on coating color matching.

Schlage L Series mortise lock: heavy-duty commercial mortise lock available in US32D (satin stainless) for exterior, healthcare, and high-chemical-exposure applications.

US19 / 622Flat Black

Interior Only

Flat black powder coat or paint over various base metals. Availability varies by manufacturer and product series. Used in modern architectural and hospitality applications. Interior applications only in standard configurations. Powder coat durability exceeds paint but both are surface coatings subject to chipping in high-impact areas.

US10 / 612Satin Bronze Plated (Dark Bronze)

InteriorLimited Exterior

Dark bronze plated over steel base, satin texture. Sometimes called duranodic bronze or architectural bronze depending on the manufacturer. Common on Von Duprin exit device trim in bronze-dominant building aesthetics. Duranodic (US711) is an anodized aluminum version often specified for aluminum door applications.

304 vs 316 Stainless Steel: When Standard US32D Is Not Enough

Both 304 and 316 stainless steel carry the US32D/630 finish designation under ANSI A156.18 because both produce an identical satin stainless appearance. The designation does not specify the grade. For most inland commercial applications, 304 stainless provides completely adequate corrosion resistance. In coastal and marine environments, the grade distinction becomes critical.

The Chloride Ion Problem

304 stainless steel is susceptible to pitting corrosion when exposed to chloride ions in concentrations found in salt air near coastlines. The chromium oxide passive layer that gives stainless steel its corrosion resistance breaks down locally under sustained chloride exposure, producing small, dark pitting marks on the surface.

316 stainless steel adds 2 to 3 percent molybdenum to the alloy, which dramatically increases resistance to chloride-ion pitting. Molybdenum stabilizes the passive layer against chloride attack. This makes 316 the correct specification for coastal and marine environments.

When to Specify 316-Grade Stainless

Specify 316-grade stainless explicitly, as a separate notation in the hardware schedule beyond just US32D, for any of the following:

Any opening within approximately three miles of saltwater shoreline, including ocean, bay, tidal river, or inlet
Marine and waterfront environments regardless of the exact distance measurement
Buildings with indoor swimming pools where chlorinated water vapor is present in the air
Food-processing environments using salt brine or other chloride-containing processing fluids

The 316 specification language that prevents receiving 304: A hardware schedule that specifies "US32D (630)" without calling out 316 grade will receive 304 stainless, because 304 is the standard-production grade for US32D hardware. To receive 316 grade, the specification must explicitly state "US32D/630, 316-grade stainless steel" or "BHMA 630, Type 316 stainless." Without this language, even a project with a coastal environment note does not guarantee 316 is supplied. Call SecurityParts.com at 845-935-0301 to confirm 316-grade availability by product series before finalizing the specification.

Environment-Specific Finish Recommendations

Coastal and Marine

Specify: US32D/630, 316-grade stainless explicitly. Do not accept 304 substitution on coastal projects.

Avoid: US26D (chrome plating fails rapidly in salt air), US3/US4 (brass corrodes and discolors), US10B (patina accelerates in salt air), US28/628 (aluminum develops white oxidation in high-salt locations over time).

Door closers: LCN and other closer manufacturers typically do not offer 316 stainless closer bodies. Use a painted powder coat finish and expect more frequent maintenance cycles than inland installations.

Healthcare and Hospital

Specify: US32D/630 satin stainless for all patient-contact and high-clean areas. Stainless steel resists bleach, quaternary ammonium disinfectants, and hydrogen peroxide products standard in healthcare cleaning protocols.

Antimicrobial option: Some Allegion product lines offer US26D-AM (antimicrobial satin chrome) and US32D-AM (antimicrobial satin stainless). Availability is product-specific. Call 845-935-0301 to confirm before specifying.

Food Service and Commercial Kitchen

Specify: US32D/630 satin stainless throughout. Food service environments use strong chlorinated sanitizers, degreasers, and acid-based cleaners that degrade chrome plating rapidly.

Fastener note: Also specify stainless steel fasteners for all hardware mounting. Standard zinc-coated or black oxide screws will rust in high-moisture kitchen environments, compromising appearance and hardware security.

Standard Commercial Interior

Specify: US26D/626 satin chrome for interior non-wet, non-chemical-exposure corridors and offices. Best-selling commercial interior finish with clean contemporary appearance at lower cost than US32D and adequate durability in climate-controlled environments.

Upgrade to US32D when: The opening is in a wet area, subject to frequent harsh chemical cleaning, or on a long-term project where finish uniformity matters. US32D maintains consistent appearance longer as chrome plating gradually dulls over years of service.

How to Match Finishes Across a Complete Door Opening

A complete commercial door opening includes multiple hardware components from potentially different manufacturers: a lockset or exit device, a door closer, hinges, and possibly a kickplate, push plate, pull bar, or door viewer. All visible hardware in a single opening should match in finish tone. Mismatches are visible and are typically cited as non-conformance during punch list inspections.

LCN Door Closer Painted Finish Codes

Door closers present a unique matching challenge. The complex body geometry of a door closer makes uniform plating impractical and expensive. Industry convention specifies door closers in painted finishes that complement the lockset and exit device finish rather than exactly matching the plated finish.

LCN 4040XP Series painted finish codes: 689 is painted aluminum (silver-toned, pairs with US26D and US28 hardware); 690 is painted dark bronze (pairs with US10B and US10 trim); 691 is painted light bronze (pairs with US10B and similar bronze-toned trim). When specifying a complete opening, list the closer finish as 689, 690, or 691 depending on the lockset finish, not as a US code.

LCN 4000 Series surface-mounted door closer: specified in painted finish codes (689 aluminum, 690/691 bronze) rather than US plated codes. Match the tone of the closer finish to the lockset and exit device finish.

Von Duprin Exit Device Finish Codes

Von Duprin uses a combined finish designation on exit device orders. Common codes: US32D or 630 for satin stainless; US26D or 626 for satin chrome; US28 or 628 for satin aluminum on aluminum exit device configurations; US10B or 613 for oil-rubbed bronze on trim components. The mechanism case of most Von Duprin rim devices ships in painted aluminum or steel regardless of the ordered finish code: the finish code applies primarily to the latch, strike, and trim components.

Browse Von Duprin exit device parts by series and Von Duprin electric strike parts in US32D and US26D at SecurityParts.com.

Schlage Hardware Finish Availability

Schlage ND Series cylindrical locks and Schlage L Series mortise locks are available in all standard US and BHMA finish codes including US26D, US32D, US10B, and US28. Not every function code is available in every finish within every series. Confirm finish availability for the specific function code before finalizing a project hardware schedule.

How to Read Finish Codes on a Commercial Hardware Schedule

Hardware schedules list finish codes in a standardized column format. Reading this column correctly prevents ordering errors that cause finish mismatches and punch list delays.

Identify which code system the schedule uses Some schedules use US codes (US26D), some use BHMA codes (626), and some use both. Identify the system in the schedule legend or general notes before reading individual line items.
Cross-reference to the product catalog system If the schedule uses US codes and the manufacturer catalog uses BHMA codes, translate before ordering. US26D equals 626. US32D equals 630. Do not assume the codes transfer without verification.
Check for 316-grade stainless callouts A schedule that lists US32D or 630 without an explicit 316-grade notation defaults to 304 stainless. If the project is in a coastal, pool, or high-chloride environment, look for supplementary spec language and clarify with the specifier before ordering if it is absent.
Verify finish availability for each line item Not every hardware product is available in every finish. A schedule that specifies US32D for all hardware may have line items where the specified product is only available in US26D in that series. Identify exceptions before issuing purchase orders.
Confirm closer finish separately Door closers are listed with painted finish codes (689, 690, 691) rather than US codes. If a US code appears in the closer line, contact the manufacturer to confirm the intended painted finish equivalent.

For a complete guide to commercial door hardware standards and ANSI/BHMA certification grades, refer to the ANSI/BHMA standards guide linked in the opening section of this blog. For hardware maintenance intervals by finish type, see the commercial door hardware maintenance checklist. For guidance on choosing between OEM and aftermarket replacement parts in any finish, see the OEM vs aftermarket commercial door hardware parts guide.

Why Choose SecurityParts.com for Finished OEM Hardware Parts

SecurityParts.com stocks Von Duprin exit devices, Schlage ND Series cylindrical locks, Schlage L Series mortise locks, and LCN closers in all standard finish codes with same-day OEM shipping from US warehouses.

US26D exterior failure mechanism documented: We document the specific mechanism by which US26D fails on exterior applications so facility managers understand why environment specification is a decision made at ordering, not in the field.
316-grade specification language: We document that US32D/630 without a grade callout defaults to 304 stainless, and provide the exact specification language required to ensure 316 is supplied on coastal projects.
Living finish warranty exclusion: We document that oil-rubbed bronze wear-through is intentional and excluded from most manufacturer warranties, so facility managers understand what they are specifying on high-traffic doors.
BHMA 626 vs 652 distinction: We document when the same US26D appearance from two different base metals matters for fire listing compliance.
316-grade availability confirmation: Call 845-935-0301 to confirm 316-grade stainless availability by product series before finalizing coastal or pool project specifications.

Free shipping on orders over $450. Same-day shipping from US warehouses on stocked parts. Call 845-935-0301 for finish matching support.

About the Author

This guide is published by the commercial door hardware team at SecurityParts.com, a supplier of OEM commercial door hardware parts since 2001. The team provides finish specification support and parts identification for exit devices, cylindrical locks, mortise locks, and door closers across commercial, institutional, and healthcare projects. For finish matching support or to confirm 316-grade stainless availability on a specific product series. Call 845-935-0301 for assistance.

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