American Lock A21 Steel Padlock Keyed Different 5-pin

Product Description

The AMERICAN LOCK A21 is a rectangular steel-body padlock built for general-purpose security in trade and industrial applications. The body measures 1.75 inches wide and 0.75 inches thick, housing a 5-pin tumbler cylinder on a keyed-different configuration, meaning each lock ships with its own unique key set. The shackle is boron alloy steel, measuring 0.3125 inches in diameter, 0.75 inches of clearance width, and 2 inches in height. At 0.83 pounds, this is a solid, compact lock suited for gate hasps, tool cribs, HVAC equipment lockout points, panel enclosures, and valve lockout applications.

The A21 fits residential and light commercial access control needs where a non-rekeyable, keyed-different padlock is acceptable. Common install scenarios include securing electrical panel enclosures per NFPA 70E lockout-tagout procedures, chaining HVAC condenser units, gate access points, and storage areas on service vehicles or job sites. The non-rekeyable design keeps key control straightforward for single-user or single-asset assignments.

Key Features

• 5-pin tumbler cylinder for improved pick resistance over standard 4-pin designs
• Boron alloy steel shackle offers greater cut resistance than standard hardened steel
• Keyed different — each lock includes its own unique key
• Rectangular steel body provides a compact, durable profile
• Non-rekeyable construction simplifies key control for dedicated-asset use
• Lightweight at 0.83 pounds for easy carry and repeated daily use

Compatibility

Designed as an OEM-style replacement or direct-fit padlock for standard hasp and shackle-loop applications requiring a 1.75-inch rectangular-body lock with a 0.75-inch shackle clearance.

Installation Notes

Installation is performed by qualified tradespeople following applicable lockout-tagout procedures per NFPA 70E or OSHA 29 CFR 1910.147 before securing electrical or mechanical equipment. Verify hasp slot width and shackle clearance requirements before selecting this lock for a specific application. Do not force the shackle into an undersized hasp, as this can damage the locking mechanism. Store keys separately from the locked asset to maintain effective access control.