Master Lock Company MLK6321 Shrouded Padlock Commercial

Product Description

The MASTER LOCK COMPANY MLK6321 is a shrouded high-security padlock engineered for commercial and industrial applications where resistance to physical attack is a primary requirement. The body is constructed from heavy steel, and the shackle is forged from hardened boron alloy, providing maximum resistance to cutting, sawing, and bolt-cutter attack. A dual ball locking mechanism engages on both sides of the shackle to counter pulling and prying forces. The five-pin cylinder incorporates spool pins for enhanced pick resistance and is fully rekeyable, making it practical for facilities that require periodic rekeying without replacing hardware.

The MLK6321 is designed for demanding commercial and industrial environments. Typical installations include securing truck doors, trailers, vans, moving trucks, and manufacturing facility access points. The shrouded shackle design limits exposed metal, further reducing vulnerability to cutting tools. This padlock is appropriate for fleet security, warehouse access control, and any fixed or transport asset requiring a high-security locking solution installed by facilities maintenance personnel or security professionals.

Key Features

• Hardened boron alloy shackle resists cutting, sawing, and bolt-cutter attacks
• Heavy steel body provides robust protection against impact and physical attack
• Shrouded shackle design limits exposed shackle surface to reduce cutting access
• Dual ball locking mechanism resists pulling and prying on both shackle sides
• Rekeyable five-pin cylinder allows rekeying without full hardware replacement
• Spool pins in the cylinder provide enhanced resistance to picking and bumping

Compatibility

Designed as a commercial-grade replacement or upgrade padlock suitable for truck door hasps, trailer door hardware, van door locks, and standard commercial padlock mounting applications in industrial and fleet environments.

Installation Notes

Installation does not require special tools beyond verifying hasp alignment and shackle clearance at the intended mounting point. Confirm the hasp opening diameter is compatible with the shackle dimensions before installation. Do not force the shackle into an undersized hasp, as this can damage the locking mechanism. Facilities personnel or a licensed locksmith should perform rekeying operations on the five-pin cylinder in accordance with the manufacturer's rekeying instructions.