LD-338 Zinc Alloy Cylindrical Door Knob Lockset | Wholesale Supplier

The LD-338 zinc alloy cylindrical door knob lockset is a versatile, ready-to-install door hardware solution engineered for residential homes, apartments, offices, and hospitality properties. The knob and chassis are die-cast from durable zinc alloy, delivering a solid feel and consistent dimensional accuracy across production runs. A round, sphere-style knob design provides a comfortable grip and a timeless aesthetic that suits both traditional and contemporary interiors. The lockset supports three core functions to cover the full range of door hardware requirements: passage function for hallways and closets where latching without locking is needed, privacy function for bathrooms and bedrooms with a push-button or turn-lock mechanism, and entry function for exterior and security doors that demand keyed access control. This functional flexibility allows builders, contractors, and distributors to standardize on a single knob design across an entire project while specifying the correct function for each individual door.

At the core of the lockset is a precision brass 5-pin tumbler cylinder paired with nickel silver keys, delivering smooth operation and dependable security for entry applications. The latch mechanism is constructed from hardened steel for positive latching and reliable deadlocking that withstands years of daily use. An 8mm square steel spindle transfers rotational force from the knob to the latch with minimal play, ensuring crisp, responsive operation. The set accommodates standard door thicknesses from 35mm to 50mm and adjustable backsets of 60mm and 70mm, ensuring compatibility with the most common residential and commercial door preparations. The SC1 and KW1 keyway options align with North American keying standards, simplifying rekeying and key duplication for end users, locksmiths, and property managers.

The LD-338 is offered in six popular finishes, including polished brass, satin nickel, polished chrome, oil-rubbed bronze, antique brass, and matte black, allowing architects and designers to coordinate hardware across a complete property. The rose plate, measuring 55mm to 65mm in diameter, conceals mounting hardware for a clean, finished appearance on both sides of the door. For wholesale buyers, door hardware distributors, and project contractors, the lockset offers extensive OEM customization, including logo application, custom finishes, keyed-alike and master key systems, and tailored packaging. The product meets CE, ISO 9001, ANSI/BHMA Grade 2, and EN 12209 standards and is packaged in individual color boxes complete with mounting hardware and keys. With a minimum order quantity of 200 sets and a production lead time of 15 to 25 days, this cylindrical door knob lockset is a high-value addition to any locks and door hardware catalog serving new construction, renovation, and replacement markets.