LD-181 Steel Chassis Mortise Lock Body Mechanism | Wholesale Supplier

The LD-181 Steel Chassis Mortise Lock Body is the internal locking mechanism that forms the security core of mortise door lock systems. Housed in a cold-rolled steel chassis for maximum strength and tamper resistance, the lock body contains both a spring-loaded latch bolt for convenient push-close operation and a deadbolt for keyed security engagement. The latch bolt is cast from solid brass for corrosion resistance and smooth engagement with the strike plate, while the deadbolt provides a 20mm steel throw that resists forced entry. A reversible latch design allows the lock to be used on both left-hand and right-hand doors without modification, simplifying inventory management for distributors and installers. The lock body accommodates three standard backset distances (60mm, 65mm, and 70mm) to fit international door thickness standards and frame configurations. The zinc alloy spindle hubs connect to lever handles or knob sets on both sides of the door, while hardened steel anti-saw pins protect the deadbolt from cutting attacks. The internal spring mechanism uses high-carbon steel springs rated for over 200,000 cycles of reliable operation. A full-face strike plate with reinforced box provides secure engagement point in the door frame. Packaged in blue cardboard boxes or blister packs with all necessary mounting screws and strike plate. Whether installing mortise locks in new construction wooden doors, replacing worn lock bodies in residential entry doors, outfitting commercial building doors, or specifying hotel room lock mechanisms, the LD-181 mortise lock body provides reliable security performance.