American Lock A42KA-43278 Steel Keyed Alike Padlock

Product Description

The AMERICAN LOCK A42KA-43278 is a rectangular-body steel padlock designed for keyed-alike applications in commercial, industrial, and trade environments. The body measures 1.5 inches wide and 0.75 inches thick, providing a compact, durable profile. The shackle is constructed from boron alloy for enhanced cut resistance and measures 0.25 inches in diameter, 0.75 inches of clearance width, and 3 inches in height. With a 5-pin cylinder, this non-rekeyable lock delivers consistent, reliable security. Electricians, HVAC techs, plumbers, and other trade professionals use keyed-alike padlocks to standardize lockout/tagout programs across multiple points with a single key.

This padlock suits lockout/tagout (LOTO) procedures required under OSHA 29 CFR 1910.147 for energy control on electrical panels, valve handles, circuit breakers, and equipment shutoffs. The keyed-alike configuration allows a single key to operate multiple A42KA-43278 units purchased together, reducing key management complexity on job sites with several isolation points. It fits standard lockout hasps and valve lockout devices used across HVAC, plumbing, and electrical trades.

Key Features

• Steel body construction with rectangular profile for durability in industrial environments
• Boron alloy shackle resists cutting and provides elevated physical security over standard steel shackles
• Keyed-alike configuration — multiple units operate with the same key
• 5-pin cylinder provides reliable pick resistance for trade lockout applications
• Non-rekeyable design maintains key control integrity over the lock's service life
• Compact 1.5-inch body width fits standard lockout hasps and lockout station equipment

Compatibility

Designed as an OEM-style replacement or direct-use padlock compatible with standard lockout/tagout hasps and valve lockout devices used in HVAC, electrical, and plumbing trade applications.

Installation Notes

Installation and removal of lockout padlocks must be performed by authorized, trained personnel following an established energy control procedure. Always verify all energy sources are fully isolated and de-energized before applying the lock. Refer to OSHA 29 CFR 1910.147 and facility-specific LOTO programs for procedural requirements. Do not use this padlock as the sole means of energy isolation without confirming the hasp or lockout device is rated for the application.