LD-323 Hardened Steel Heavy-Duty Padlock with Boron Alloy Shackle | Wholesale Supplier

The LD-323 hardened steel heavy-duty padlock is engineered for the most demanding security applications where conventional padlocks are simply not enough. Built in the recognized HUL type configuration, it features a hardened zinc alloy steel body sized from 50mm to 80mm that provides substantial mass and structural rigidity to withstand hammer strikes, drilling, and prying attempts. The defining element of this padlock is its boron alloy hardened shackle, which delivers exceptional cut resistance far exceeding that of standard hardened steel. With a shackle diameter of 10 to 12mm and a clearance of 25 to 40mm, the LD-323 accommodates thick chains, heavy hasps, and industrial locking hardware while presenting a minimal exposed shackle target for attack.

At the core of the lock sits a 6-pin tumbler mechanism that offers a higher level of pick and bump resistance than standard 5-pin designs, making it well suited to high-security environments such as shipping containers, construction sites, warehouses, and utility infrastructure. The 6-pin cylinder uses nickel silver keys for smooth, corrosion-resistant operation over thousands of locking cycles, and the precision machining ensures consistent performance even in dusty or humid conditions. Body finishes include black with a brass shackle for a combination of stealth and corrosion resistance, chrome plating for a premium appearance, and a gold-brass body option for high-visibility security applications. Each padlock is supplied with keys for convenient spare access.

For wholesale buyers, security equipment distributors, and industrial suppliers, the LD-323 represents the top tier of the padlock range and commands a premium position in any security catalog. The boron alloy shackle is a compelling selling point for customers who require certified-grade cut resistance, and the robust 6-pin tumbler mechanism supports keyed-alike and master key systems for managing large fleets of locks across facilities, sites, and infrastructure assets. OEM logo engraving, custom shackle lengths and diameters, and custom body finishes are available to align with brand requirements and regional market preferences. With a minimum order quantity of 200 pieces, mixed orders across sizes supported, and a production lead time of 15 to 25 days, the LD-323 offers importers a true top security heavy-duty padlock that meets the rigorous demands of industrial, commercial, and high-value asset protection at competitive wholesale pricing.