The LD-342 solid brass mortise and rim lock cylinder is a precision security component engineered for door lock replacement and OEM lock manufacturing across residential, commercial, and institutional applications. The cylinder housing is machined from solid brass, a material prized for its machinability, dimensional stability, and corrosion resistance, ensuring consistent plug rotation and reliable pin alignment even in demanding environments. Inside, nickel silver pins and springs interact with a brass plug to create the proven pin tumbler security mechanism, while nickel silver keys provide durable, wear-resistant operation through thousands of insertion cycles. Available in 5-pin and 6-pin configurations, the cylinder offers the key combination depth and pick resistance appropriate to each security level, from residential rekeying to commercial master key systems.

Designed for broad compatibility, the LD-342 is produced in cylinder diameters of 16mm, 20mm, 25mm, and 30mm with body lengths from 25mm to 60mm, allowing it to fit mortise lock bodies, rim cylinders, night latches, and cam lock applications. A range of cam types is offered, including flat cam, offset cam, and hook cam, so the cylinder can be matched precisely to the lock mechanism it drives. Keyway options include the widely used SC1, KW1, and UL2 profiles, with custom keyways available for OEM and proprietary systems. Cylinders can be configured as keyed alike, keyed different, or as part of a master key system, giving distributors and locksmiths the flexibility to support single-door replacements and large multi-door keying projects alike.

The cylinder is offered in polished brass, satin brass, satin chrome, polished chrome, and antique brass finishes to coordinate with existing door hardware, and each unit meets CE, ISO 9001, and ANSI/BHMA quality standards for dependable, certified performance. With a minimum order quantity of 500 pieces and a production lead time of 15 to 25 days, the LD-342 is an economical, high-quality choice for door hardware distributors, lock manufacturers, and security contractors who require reliable, customizable replacement cylinders in volume. Whether replacing worn mortise cylinders, rekeying commercial rim locks, building master key systems, or supplying OEM lock assemblies, the LD-342 delivers consistent precision and proven pin tumbler security.