Kwikset 81640-003 Plastic Strike Box Deadbolt

Product Description

The KWIKSET 81640-003 is a plastic strike box designed to reinforce the door frame at the deadbolt latch point. It fits behind standard deadbolt strike plates, providing a recessed pocket that accepts the deadbolt throw and helps protect the door jamb from wear and splitting over time. Measuring 3.5 inches in length, 1.1 inches in width, and 0.2 inches in height, it is a low-profile component that installs without major modification to the jamb. Locksmiths, door hardware installers, and general contractors typically handle this type of replacement or new-installation work.

This strike box is suited for residential door hardware applications where a deadbolt strike plate is being installed or replaced. It is commonly used during new construction, door hardware upgrades, or repair work where the existing strike box is cracked, missing, or incompatible with the replacement strike plate. It ships as a single unit and is compatible with the full range of KWIKSET deadbolt strike configurations.

Key Features

• Low-profile plastic construction at 0.2 inches in height for flush jamb integration
• 3.5 inch length and 1.1 inch width sized for standard residential deadbolt strike cutouts
• Designed to seat behind deadbolt strike plates to protect the door jamb pocket
• Lightweight at 0.05 pounds for easy handling during installation
• Sold individually as a single replacement unit

Compatibility

Designed as an OEM-style replacement strike box compatible with KWIKSET deadbolt strike plates across residential door hardware applications.

Installation Notes

Installation is typically performed by a locksmith or experienced door hardware installer. Before beginning work, ensure the door is in a safe, secured position and all related hardware is removed from the jamb. The strike box seats into the mortised pocket in the door frame behind the strike plate and should be aligned carefully before the strike plate is fastened. Follow local building codes for door frame reinforcement requirements where applicable.