Master Lock 81KALJ-12R12 Laminated Steel Padlock Keyed Alike

Product Description

The MASTER LOCK 81KALJ-12R12 is a laminated steel padlock designed for heavy-duty security applications in trade and industrial environments. It features a 5-pin tumbler cylinder and a keyed-alike configuration, meaning multiple locks operate from the same key — a practical setup for facilities managers, contractors, and service crews managing multiple access points. The body is constructed from laminated steel for resistance to drilling and prying. The shackle is 5/16 inches in diameter, 3/4 inches wide, and provides 2-1/2 inches of clearance, giving it enough reach for standard hasps, chains, and gate hardware.

This padlock is suited for securing electrical panels, mechanical rooms, gate chains, equipment enclosures, and job-site storage in both residential and commercial settings. The keyed-alike feature is especially useful on multi-lock installations where a single key needs to operate every lock on a job site or facility. The gray and silver laminated steel body is built to hold up in outdoor and industrial conditions where abrasion and tampering are common concerns.

Key Features

• Keyed-alike configuration allows one key to operate multiple locks of the same keying
• Laminated steel body construction provides superior resistance to drilling and prying
• 5-pin tumbler cylinder for increased pick resistance
• 5/16-inch diameter steel shackle with 2-1/2 inches of vertical clearance
• Compact 1-3/4-inch body width fits standard hasps and hardware
• Weighs 0.706 pounds — substantial construction without excess bulk

Compatibility

Designed as a direct-fit replacement for standard laminated steel padlock applications using common hasp, chain, and gate lock hardware that accepts a 5/16-inch shackle diameter.

Installation Notes

Installation requires no special tools — align the shackle with the hasp or chain loop and engage the locking mechanism. Before securing electrical panels or mechanical enclosures, ensure all equipment is de-energized and locked out in accordance with applicable OSHA lockout/tagout (LOTO) procedures. Verify the hasp or anchor hardware is rated for the intended security load before relying on this padlock as a sole access control measure.