Master Lock 878 Combination Lock Zinc Powder Coated

Product Description

The MASTER LOCK 878 is a zinc-body combination lock with a powder-coated finish and a set-your-own 4-digit dial combination. The lock body measures 3 inches high and 2 inches wide. The hardened steel shackle is 5/16 inches in diameter with 1 inch of shackle clearance, providing a secure fit across a wide range of hasp and latch hardware. Designed for weather-resistant performance, this lock is suited for outdoor and industrial environments where exposure to moisture, dust, and general site conditions is expected. Licensed tradespeople and facilities maintenance staff use this lock to secure equipment, utility access points, and controlled areas.

The 878 is well suited for use on cable boxes, construction site equipment, industrial and storefront gates, manufacturing environments, substations, and utility meters. Its resettable 4-digit dial combination eliminates the need for keys and allows authorized users to update the combination without replacing the lock. The powder-coated zinc body resists corrosion in light outdoor exposure, making it a practical choice for both temporary and long-term installations at commercial and industrial sites.

Key Features

• Set-your-own 4-digit dial combination — no keys required
• Combination is resettable without replacing the lock
• Zinc body with powder-coated finish for corrosion resistance
• Hardened steel shackle, 5/16 inches diameter with 1 inch clearance
• Weather-resistant construction rated for outdoor and industrial use
• Compact body at 3 inches high by 2 inches wide for broad hardware compatibility

Compatibility

Suitable for use with cable boxes, construction sites and equipment, industrial and storefront gates, manufacturing environments, substations, and utility meters as specified by the manufacturer.

Installation Notes

Installation does not require tools — insert the shackle through the hasp or latch and close the lock body. Before placing the lock into service, follow the manufacturer instructions to set a unique combination. Power down or de-energize any electrical equipment before securing access panels or enclosures. Verify the shackle diameter and clearance dimensions are compatible with the receiving hasp before purchase.