The Schlage CS210 is the CS200 Series Grade 2 interconnected lock. It combines a cylindrical latch and deadbolt in one assembly so turning the inside lever retracts both simultaneously in one motion, meeting IBC and NFPA 101 single-motion egress requirements. The main replacement parts are the lever kit (06-242), rose (08-029), inside escutcheon (Camelot or Plymouth), outside housing (B500 commercial or B60 residential), strikes, and the interconnect assembly. The crimp-to-snap rose transition in August 2015 is the most important fact for parts ordering: pre-2015 units with crimp-on roses require the outside chassis assembly (F206-496) when changing levers or roses.

Interconnected locks are on more apartment building, hotel, dormitory, and assisted living entry doors than any other lock type in the multifamily residential sector. They are specified because they solve a specific problem that no other single hardware component solves: providing both a spring latch for automatic latching and a deadbolt for security, while allowing a single inside lever motion to retract both simultaneously for code-compliant egress.

The Schlage CS210 is the most widely installed commercial interconnected lock in North America. It carries ANSI/BHMA Grade 2 certification, UL 3-hour fire door listing, and a lifetime limited mechanical warranty. When one fails or requires a lever change, rose replacement, or escutcheon update, the rose generation transition in 2015 creates a parts compatibility issue that catches most technicians off guard. This guide covers every component, that transition, the code context, and exactly how to order. Browse the complete interconnected lock parts catalog at SecurityParts.com for CS210 diagrams and components.

What an Interconnected Lock Is and Why It Exists

An interconnected lock is a single hardware assembly that combines two separate locking mechanisms, a spring latch and a deadbolt, with a mechanical interconnection that allows both to retract simultaneously when the inside lever is turned. From the outside, the lock operates as a standard keyed deadbolt entry. From the inside, turning the lever once retracts both the deadbolt and the latch in a single motion, allowing free exit without any separate deadbolt thumb turn operation.

This single-motion egress capability is the entire reason the category exists. IBC Section 1010.1.9 and NFPA 101 both require that doors in a means of egress unlatch with no more than one releasing motion. For most commercial occupancies, installing a separate cylindrical latch and a separate deadbolt creates a two-motion exit requirement that violates this code, because the occupant must turn the deadbolt thumb turn and then turn the lever separately to exit.

The interconnected lock solves this by making the inside lever turn the only operation needed for exit. The deadbolt and latch both retract together. The door opens. One motion. Code compliant.

Where the Schlage CS210 Is Specified

The CS210 appears most frequently on dwelling unit entry doors in commercial multi-family buildings: apartment complexes, condominiums, dormitories, extended-stay hotels, and assisted living facilities. The specific application logic that drives the CS210 specification is the need for resident-facing security with single-motion egress in a commercial-grade fire-rated assembly.

Assisted living facilities are a particularly important distinction. Assisted living units are classified as Residential Board and Care occupancies under NFPA 101, not standard residential occupancies. The residential dwelling unit exception that allows a separate deadbolt does not apply to assisted living units. On assisted living dwelling unit entry doors, an interconnected lock or mortise lock is required in most jurisdictions because a separate deadbolt and latchset do not comply with one-motion egress for this occupancy type.

For institutional dormitories, hotel properties, and any jurisdiction with accessible or adaptable unit requirements, interconnected locks are often specifically mandated by local code supplements to the IBC. Massachusetts 521 CMR, for example, explicitly requires interconnected locks on accessible and adaptable dwelling units.

CS210 vs Separate Deadbolt vs Mortise Lock: Which One Fits the Opening

Every Component in the Schlage CS210

Outside Housing Assembly: B500 vs B60

The CS210 offers two outside deadbolt housing configurations. This is the first specification decision and it determines the security level of the entire assembly.

CS210-B500 (commercial spin ring): The B500 outside housing includes a free-spinning cylinder collar that resists wrenching and prying. It also includes a removeable security shield that protects the deadbolt from ice-pick attacks through the door face. These are the same security features found in the Schlage B600 Series Grade 1 deadbolt. The B500 housing is the correct specification for any commercial or institutional application where physical attack resistance matters. The cylinder collar spins freely under wrench pressure rather than providing purchase for torque.

CS210-B60 (residential spin ring): The B60 housing is the residential version for multi-family buildings where the aesthetic and cost profile of a residential deadbolt is appropriate and the additional attack resistance features of the B500 are not required by the specification.

Lever Kit (Part 06-242)

The CS210 lever kit (part 06-242) includes two matching levers, one outside and one inside. The CS200 Series offers 18 lever designs allowing the CS210 to match the aesthetic of other Schlage hardware throughout the same building. Lever designs are available in seven finishes including satin chrome (626), brushed nickel (619), matte black, polished brass (605), aged bronze, and others.

Lever replacement is needed when a lever is physically damaged, when a finish change is required after a renovation, or when a lever becomes stiff or fails to return to horizontal due to internal spring fatigue. The lever kit includes both levers, which keeps inside and outside matching during replacement. Always confirm the finish code before ordering a replacement lever kit.

Rose (Part 08-029)

The rose is the circular cover plate visible on the door face around the outside lever and cylinder area. The CS210 offers two outside rose designs: Plymouth and Saturn. The rose is finish-specific. Part 08-029 is the standard rose for snap-on rose installations (August 2015 and later). For crimp-on rose installations (pre-August 2015), see the crimp-to-snap section below before ordering any rose replacement.

Inside Escutcheon: Camelot (CAM) and Plymouth (PLY) Designs

The inside escutcheon is the decorative plate on the interior face that covers the inside chassis and positions the inside lever and thumb-turn plate. The CS210 offers two inside escutcheon designs: Camelot (CAM) and Plymouth (PLY). Both designs are available in the same seven finishes as the levers.

The inside escutcheon houses the adjustable thumb-turn plate assembly that supports both the 4-inch and 5-1/2-inch center-to-center door prep conversions. The escutcheon plate adjustment is a field modification; no additional parts are ordered for a center-to-center conversion. If the escutcheon itself is damaged or a design change is required, the escutcheon is an individually replaceable component.

Interconnect Assembly

The interconnect assembly is the internal mechanism that links the inside lever to both the deadbolt and latch, enabling the simultaneous retraction in one motion. This is the component that makes an interconnected lock different from a standard cylindrical lock with a separate deadbolt.

The interconnect assembly carries the load of both the deadbolt spring and the latch spring when the inside lever is turned. This combined spring load requires slightly more torque to operate than either a latch-only or deadbolt-only lock. The design intent is that a healthy adult requires no additional force beyond a normal lever turn. However, the combined spring load can become problematic for elderly, infirm, or physically limited occupants on doors where both springs are at the high end of their adjustment range. If a CS210 installation is reporting difficulty operating the lever, check that neither spring is adjusted beyond the standard setting before assuming the interconnect assembly has failed.

Interconnect assembly replacement is required when the inside lever turns but only one of the two mechanisms (latch or deadbolt) retracts, when the interconnect binding causes the lever to feel mechanically stiff at a specific point in its rotation arc, or when the assembly fails to fully return to the latched position after a lever release. Center-to-center conversion (4 inch to 5-1/2 inch or reverse) is made by a field modification to the interconnect assembly without requiring a replacement part.

Strike Plate (Part 10-109 and 10-121 Combination Strikes)

The CS210 uses a combination strike that includes both a deadbolt strike and a deadlatch strike in a single plate assembly. Both strikes must be correctly positioned in the door frame for the lock to operate without binding. The CS210 standard combination strike is part 10-109. The 10-121 is an alternate combination strike. A T-strike (1-5/8 inch by 2-1/4 inch) is also available for the deadbolt portion.

Strike alignment is the most common cause of a CS210 installation that feels stiff or incomplete on either the deadbolt throw or the latch engagement. Because the CS210 operates two mechanisms simultaneously, even minor vertical misalignment of either strike pocket creates binding that feels like internal mechanism failure. When a CS210 is reported to be stiff or incomplete in its operation, verify both strike alignments before diagnosing internal components.

The CS210 also includes a metal wood frame reinforcer using 3-inch screws that anchor into the door frame stud for kick-in resistance. This is the same dust box concept as the B Series deadbolt and its presence significantly increases the resistance of the frame to forced entry. It should always be installed and is not optional on any security-sensitive application.

Deadbolt Strike (Part 10-116)

The deadbolt-only strike (part 10-116) is a round corner strike, 1-1/8 inch by 2-3/4 inch, no lip. This is used when the deadbolt and latch have separate frame preps rather than a combined pocket. Always confirm whether the installation uses a combination strike or separate strikes before ordering replacement hardware.

The Crimp-On to Snap-On Rose Transition: The Most Important CS210 Service Fact

In August 2015, Schlage transitioned the CS210 from crimp-on roses to snap-on roses. This transition is completely undocumented in most parts supplier catalogs and is the single most common cause of wrong-part returns on CS210 service calls.

How to Identify Which Generation Your Lock Is

Remove the outside rose from the door face. Examine the base of the rose where it meets the door surface. Snap-on roses have retention dimples at the base. Crimp-on roses do not have these dimples and have a smooth or rolled edge at the base instead. If you are not certain which generation is installed, this physical check takes under two minutes and prevents an incorrect parts order.

What Happens If You Order the Wrong Generation

The lever kit (06-242) and rose (08-029) designed for snap-on rose installations cannot be used on a crimp-on rose chassis. The retention mechanism is physically different and the lever will not seat correctly. If you have a pre-August 2015 installation with a crimp-on rose and order the current lever kit without also updating the outside chassis, the parts will not function correctly after installation.

The Correct Crimp-On to Snap-On Upgrade Parts

For a pre-August 2015 crimp-on rose installation that needs a lever or rose replacement, order all four of these components together:

Center-to-Center Door Prep Conversion: Field Modification Without Parts

The CS210 adjustable escutcheon plate supports both 4-inch and 5-1/2-inch center-to-center door preparations. This is the dimension between the centerline of the deadbolt bore and the centerline of the cylindrical latch bore on the door face.

The conversion is made entirely in the field by modifying the interconnect assembly position inside the escutcheon plate. No additional parts are required and no replacement components need to be ordered. The procedure is:

For 4-inch center-to-center: Remove two screws and the plate from the escutcheon assembly. Position the thumb-turn assembly with the thumb turn toward the bottom of the thumb-turn escutcheon plate.

For 5-1/2-inch center-to-center: Keep the plate in place with the two screws. The thumb-turn remains in its standard position.

This field adjustability is the design feature that eliminates job-site surprises when the existing door prep does not match a specific standard. A building with mixed 4-inch and 5-1/2-inch door preps can use the same CS210 lock on every unit door without ordering two different lock configurations.

CS210 Technical Specifications

Parts That Fail First on the Schlage CS210

Based on actual field service frequency, here is the realistic replacement sequence for CS210 components on high-traffic multi-family installations.

1. Levers. The outside lever takes physical contact on every door entry and exit. Finish wear is the most common cosmetic issue. Physical damage from cart impact or door abuse is the most common functional issue. The lever kit (06-242) replaces both inside and outside levers. Always check the rose generation before ordering (crimp vs snap as described above).

2. Strike plate alignment. This is not a parts failure but a maintenance item. Door settling in multi-family buildings causes progressive strike misalignment that shows up as a stiff deadbolt throw, incomplete latch engagement, or a lever that requires more force than normal. Check both strike alignments before diagnosing internal components. Re-securing loose strike screws or adjusting the strike position resolves most CS210 stiffness complaints without any parts replacement.

3. Cylinder. The 6-pin C keyway cylinder in the CS210 wears at the same rate as any commercial cylinder under high-cycle use. Key stiffness or a key that operates inconsistently indicates cylinder wear. As with all Schlage cylinders, use only graphite or silicone lubricant. Oil-based lubricants accelerate pin stack contamination and require cylinder replacement.

4. Inside escutcheon assembly. The inside escutcheon is subject to cosmetic damage on unit entry doors where residents are frequently carrying items. A cracked escutcheon plate or a finish that has worn through requires replacement as a complete escutcheon assembly. Confirm the Camelot or Plymouth design before ordering.

5. Interconnect assembly. The internal interconnect mechanism has the longest service life of any component in the CS210 because it is protected inside the door and does not receive direct physical contact. Interconnect failure appears as a lever that retracts one mechanism but not the other, or as an inconsistent combined retraction. Full interconnect replacement is required when this occurs.

Code Compliance: Interconnected Lock vs Separate Deadbolt on Dwelling Unit Doors

The code question that drives most CS210 specifications is whether a separate deadbolt is allowed on a dwelling unit entry door or whether an interconnected lock is required.

Where Separate Deadbolts Are Allowed

IBC Section 1010.1.9 and NFPA 101 both include an exception for Group R residential dwelling units with an occupant load of 10 or less. On these doors, a separate nightlatch, deadbolt, or security chain is permitted in addition to the latching hardware, provided the separate device can be released from the inside without a key or tool. A thumbturn-operated single cylinder deadbolt meets this requirement.

This exception applies to most apartments, condominiums, dormitory rooms, hotel rooms, and similar units. It is the reason separate deadbolts are common on apartment doors throughout the United States. In these jurisdictions, the CS210 is a premium specification option, not a code requirement.

Where Interconnected Locks Are Required

Several situations eliminate the separate deadbolt exception and require one-motion egress on dwelling unit entry doors. The first is when the local jurisdiction has adopted stricter requirements than the model codes. The second is for accessible or adaptable dwelling units in jurisdictions following accessibility standards that mandate one-motion egress hardware. The third is for assisted living and residential board and care facilities where the NFPA 101 residential occupancy exception does not apply. In all three situations, an interconnected lock or mortise lock is the only code-compliant hardware solution for a door requiring both a latch and a deadbolt.

How to Order CS210 Parts Without a Return

Four pieces of information are required before any CS210 parts order:

1. Rose generation (crimp or snap): This is the most important check. Remove the outside rose and look for retention dimples at the base. Dimples = snap-on (August 2015 or later). No dimples = crimp-on (pre-August 2015). If the lock is pre-2015, the outside chassis (F206-496) must be ordered along with the lever kit and rose.

2. Outside housing type (B500 or B60): The B500 has a free-spinning cylinder collar and security shield. The B60 does not. This is visible without disassembly: grip the exterior cylinder collar and attempt to rotate it. Free spin = B500. Fixed = B60.

3. Inside escutcheon design (Camelot or Plymouth): The Camelot design has a more traditional rectangular profile. The Plymouth has a more contemporary rounded shape. Both are visible on the interior door face without disassembly.

4. Finish code: Visible on the hardware face. Common CS210 finishes include 626 (satin chrome), 619 (satin nickel), 622 (matte black), 625 (bright chrome), and 605 (polished brass). All replacement components are finish-specific.

Browse the complete CS210 parts catalog at SecurityParts.com. For the full Schlage commercial hardware range including the CS210, ND Series, L Series, and B Series, browse the Schlage commercial hardware catalog. Pre-order support is available at 845-935-0301 or through the contact page.

Related Parts and Products at Security Parts

A complete multi-family unit entry door typically includes the interconnected lock, a surface door closer (required by fire code for self-closing on fire-rated corridor-to-unit assemblies), and sometimes an electric strike for access control on the corridor side. SecurityParts.com stocks all of these in one catalog.

For Schlage B Series deadbolt parts on unit entry doors where a separate deadbolt is permitted and specified instead of an interconnected lock, browse the deadbolts catalog. For Schlage ND Series and ALX Series cylindrical lock parts on common area corridor doors, mailroom doors, and amenity space doors in the same building, browse the cylindrical locks catalog. For Schlage L Series mortise lock parts on main building entry doors and management office doors requiring Grade 1 performance, browse the mortise locks catalog. For LCN door closer parts on unit entry doors and corridor fire doors in the same building, browse the door closers catalog. For Von Duprin exit device parts on building egress stairwells and exit doors, browse the commercial exit devices catalog.

Browse the complete all products and parts catalog to source Schlage, Von Duprin, LCN, Falcon, and Detex hardware in a single session.