Master Lock Company MLK506 Circuit Breaker Lockout Set

Product Description

The MASTER LOCK COMPANY MLK506 is a two-piece circuit breaker lockout set designed for use in lockout/tagout (LOTO) safety procedures. The set includes one device for standard 120-volt breakers and one for 240-volt and larger breakers. Each lockout features a patent-pending Grip Tight design with an adjustable thumb turn and clamping handle that secures the breaker toggle against accidental re-energization. The housing is constructed from powder-coated steel and reinforced polymer, providing durability in demanding industrial and commercial environments. Licensed electricians and safety personnel performing LOTO procedures are the primary installers and users of this set.

The MLK506 set is suited for both residential and commercial electrical panels where LOTO compliance is required. The compact form factor makes it practical for electricians and maintenance technicians to carry in a tool bag or service kit. Both devices accept standard safety padlock shackles and lockout hasp diameters compatible with American Lock and Master Lock product lines, making integration into an existing LOTO program straightforward.

Key Features

• Two-device set covers 120-volt and 240-volt-plus circuit breakers in a single kit
• Patent-pending Grip Tight design with adjustable thumb turn and clamping handle for secure toggle grip
• Powder-coated steel and reinforced polymer construction for durability in harsh environments
• Accepts American Lock and Master Lock safety padlock shackles and lockout hasp diameters
• Compact design for easy transport and storage in a tool bag or service kit

Compatibility

Compatible with American Lock and Master Lock safety padlock shackles and lockout hasp diameters. Designed for use with standard 120-volt and 240-volt-plus circuit breakers in lockout/tagout applications.

Installation Notes

Installation and application of this lockout set should be performed by a licensed electrician or qualified safety personnel following an established lockout/tagout program in accordance with OSHA 29 CFR 1910.147 and applicable NEC requirements. Always verify the circuit is de-energized and the breaker is in the OFF position before applying the lockout device. Do not apply a lockout device to an energized breaker or use it as a substitute for a proper energy control procedure. Each authorized employee working on the circuit must apply their own padlock to the hasp when group LOTO procedures are in effect.