Master Lock 6840 Pro Series Brass Padlock Keyed Different

Product Description

The MASTER LOCK 6840 is a Pro Series brass padlock designed for high-security locking applications in commercial, industrial, and trade environments. The body is constructed of solid brass, measuring 1-3/4 inches wide and 1-31/32 inches high. The shackle is boron alloy, a hardened steel alloy known for cut resistance, with a 5/16-inch diameter and 29/32-inch width. A 5-pin tumbler cylinder provides keyed different operation, meaning each lock ships with its own unique key. Electricians, HVAC technicians, and facilities personnel commonly use this padlock for lockout/tagout procedures, panel security, and equipment access control.

This padlock is suited for both indoor and outdoor use in commercial and light industrial settings. Its brass body resists corrosion in humid or wet environments, making it appropriate for mechanical rooms, rooftop equipment enclosures, pool equipment areas, and utility access panels. The keyed different configuration is standard for single-user lockout applications where each technician maintains individual key control. It is a common choice for OSHA-compliant lockout/tagout (LOTO) programs.

Key Features

• Solid brass body provides corrosion resistance in humid and outdoor environments
• Boron alloy shackle offers increased resistance to cutting and sawing
• 5-pin tumbler cylinder for enhanced pick resistance
• Keyed different operation for individual key control in lockout/tagout programs
• Compact profile: 1-3/4 inches wide and 1-31/32 inches high for use in tight spaces
• High-security classification suitable for trade and industrial use

Compatibility

Designed as a general-purpose padlock compatible with standard hasp, chain, and lockout/tagout hardware sized for a 5/16-inch shackle diameter.

Installation Notes

Installation requires no tools. Before applying this lock in a lockout/tagout application, confirm compliance with OSHA 29 CFR 1910.147 energy control procedures. Ensure all energy sources are isolated before attaching the lock. Do not force the shackle into an oversized hasp hole, as this may compromise the locking mechanism.