The Falcon 005099-000-30 is the OEM ANSI Dust Box, 1-inch deep, in steel construction, documented in the Falcon MA Series Parts Manual. It is compatible with any 4-7/8-inch high ANSI strike, confirmed in the official Falcon Locks Catalog. The 005099-000-30 is used across all Falcon T Series cylindrical lock functions (T101 through T881-IC) and across the Falcon MA Series mortise lock catalog, covering both cylindrical and mortise lock strike applications from one part number. Finish must be specified. In stock.

What a Dust Box Does in a Door Strike Installation

A dust box (also called a strike box) is the metal housing that installs into the door frame mortise directly behind the strike plate. When the door closes, the latch bolt extends through the strike plate opening and enters the dust box cavity. The dust box serves three functions simultaneously.

First, it creates a protected cavity that receives the latch bolt cleanly, without the bolt contacting raw wood, metal, or frame material that would cause premature latch wear. Second, it seals the frame cavity from dust, dirt, and debris that would otherwise accumulate in the open frame pocket behind the strike plate over the service life of the door. Third, it reinforces the door frame at the strike location. A door frame without a dust box relies entirely on the strike plate screws for structural support when the door is tested against force. The dust box distributes the latch load across a larger frame area, which strengthens the entire strike assembly against kick-in and forced entry.

Falcon 005099-000-30: ANSI Dimensions and Strike Compatibility

The "ANSI" designation in the 005099-000-30 product name refers to the dimensional standard. The American National Standards Institute (ANSI) specifies standard dimensions for door hardware strikes and their associated boxes. An ANSI strike is 4-7/8 inches high - the industry-standard height for commercial cylindrical and mortise lock strikes. The 005099-000-30 dust box is specifically designed to work with any 4-7/8-inch high ANSI strike, which covers virtually all standard commercial strike plates used with Falcon T Series and MA Series locks.

The 1-inch depth of the 005099-000-30 accommodates the full latch bolt throw for standard T Series and MA Series latch bolt configurations. The companion dust box in the Falcon catalog is the 031453-000-30, which is 3/4-inch deep for use with 3-1/4-inch high strikes. The two products are not interchangeable - confirm the strike height on the installed or specified strike plate before selecting between them.

Falcon Mortise Lock Parts and Cylindrical Lock Coverage: T Series and MA Series

The 005099-000-30 appears in the "Strikes and Dust Boxes" parts diagram for every Falcon T Series function in the catalog: T101 (passage), T291 (hospital privacy), T301 (privacy), T351 (closet), T381 (classroom security), T411 (asylum), T501 (entry), T511 (entry/office), T521 (office), T561 (classroom), T571 (dormitory), T581 (storeroom), T851 (electrified storeroom fail safe), and T881 (electrified storeroom fail secure), covering both standard and IC (interchangeable core) variants of each function.

The same dust box applies to the Falcon MA Series mortise lock catalog. The 4-7/8-inch ANSI strike format is the standard across both T Series cylindrical locks and MA Series mortise locks, which is why one dust box part number serves both product families. This reduces the number of distinct parts a facility or service contractor needs to stock when maintaining both T Series and MA Series Falcon hardware.

The Falcon MA Series carries ANSI/BHMA 156.13, Series 1000 certification and UL 3-hour A label fire door listing, both of which extend to the components specified in the MA Series Parts Manual, including the 005099-000-30 dust box.

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