The Detex 106285 is the OEM backplate extrusion in 48-inch length, silver finish, for the Detex Value Series V40 and V50/V51 exit devices. It is Item 2 in the Value Series V40/V50/V51 parts breakdown - the primary aluminum housing extrusion that runs the full length of the device. The backplate extrusion is the structural backbone of the exit device: the centercase attaches to one end, the pushpad wrap and subassembly cover the front face, and the extrusion body mounts against the door face along its full length. When the backplate extrusion is bent from impact, corroded, scratched through its anodized finish, or structurally compromised, the 106285 is the field replacement for 4-foot (48-inch) silver-finish installations.

This part is the 48-inch version. The 36-inch version is 106281. Both ship in silver finish matching the standard satin aluminum anodized (628/US28) finish on most Value Series devices installed on aluminum storefront and glass door applications. Black anodized versions (711 finish) are 106289 (36-inch) and 106290 (48-inch).

Detex Backplate Extrusion: Its Role in the V40/V50/V51 Device Assembly

The backplate extrusion is a distinct component from the fillerplate (dogging subassembly) and the mounting plate. Understanding where each sits in the device architecture is critical for ordering the correct replacement:

The mounting plate (BP series - 100696-1 for narrow stile) is the patented Detex component that mounts on the door first and establishes the strike locator position. It is the foundation the entire device assembly builds on.

The fillerplate (101812-1 for HD hex dogging, 36-inch) is the fillerplate subassembly within a dogging configuration that carries the dogging bracket and die-cast dogging mechanism. It serves a specific mechanical purpose related to the dogging function.

The backplate extrusion (106285, this product) is the primary structural housing that spans the device length. It is not function-specific - it serves the same structural purpose on every V40 and V50/V51 regardless of dogging configuration (LD, HD, CD), electrical option (EI, ER, EX), or alarm type (standard, EA, EB). The extrusion is the physical body that holds all other components together and makes the exit device a unified hardware unit.

Detex V40 and V50/V51 Backplate Extrusion Family

The backplate extrusion family for Value Series V40 and V50/V51 devices consists of four part numbers covering two lengths and two finishes:

106281 = 36-inch, Silver - for 3-foot devices in standard aluminum anodized finish.

106285 = 48-inch, Silver (this product) - for 4-foot devices in standard aluminum anodized finish.

106289 = 36-inch, Black - for 3-foot devices in black anodized aluminum finish.

106290 = 48-inch, Black - for 4-foot devices in black anodized aluminum finish.

The device length (36" or 48") corresponds to the door width range: 36-inch devices cover door openings of approximately 2'4" to 3', and 48-inch devices cover 2'10" to 4'. Confirm both the installed device length and the installed finish before ordering. Mixing a silver extrusion on a black-finish device or a 36-inch extrusion on a 4-foot device are the two most common field ordering errors on this part.

Detex Panic Hardware: Why Backplate Extrusion Replacement Matters

The backplate extrusion is the component most exposed to physical damage on an exit device installation. It runs the full horizontal length of the device at the push bar level on the door - the exact position most vulnerable to cart strikes, wheeled equipment contact, vandalism, and forced entry attempts. Aluminum extrusion damage typically presents as visible bowing or bending, deep surface gouges that compromise the anodized corrosion protection, or structural cracking that prevents correct pushpad alignment.

An exit device with a damaged backplate extrusion that allows the pushpad to misalign fails to operate correctly - the pushpad may bind, fail to return to rest position, or not retract the latch bolt fully. Replacing the 106285 extrusion restores correct device geometry without replacing the centercase, pushpad subassembly, or complete device.