Master Lock 975 Combination Lock Brass 3 Inches High

Product Description

The MASTER LOCK 975 is a brass-body combination lock designed for industrial, commercial, and utility applications where weather resistance and field-resettable security are required. The lock features a 4-digit dial combination that can be set and changed by the user, eliminating the need to manage keys on job sites. The brass body measures 3 inches high and 2 inches wide, with a steel shackle at 5/16 inches in diameter and 1 inch of shackle clearance. Licensed electricians, utility technicians, and facilities maintenance personnel are the primary installers of this lock in secured-access environments.

The MASTER LOCK 975 is suited for a broad range of commercial and industrial settings. Typical applications include cable box enclosures, construction site equipment, industrial and storefront gates, manufacturing environments, electrical substations, and utility meter enclosures. Its weather-resistant construction makes it appropriate for outdoor installations where moisture and temperature variation are ongoing concerns. The user-resettable combination is well suited for facilities that rotate access credentials or manage multi-person access without issuing physical keys.

Key Features

• Set-your-own 4-digit dial combination — resettable in the field without tools
• Brass body construction provides corrosion resistance for outdoor and industrial use
• Steel shackle rated at 5/16 inches diameter with 1 inch of clearance
• Weather-resistant design suitable for exterior gate, meter, and equipment applications
• Compact form factor — 3 inches high, 2 inches wide — fits standard hasp and staple hardware

Compatibility

Designed for use with cable boxes, construction site and equipment enclosures, industrial and storefront gates, manufacturing environments, electrical substations, and utility meter applications. Compatible with standard hasp hardware accepting a 5/16-inch shackle diameter.

Installation Notes

Install by a qualified facilities technician or trade professional following the access-control requirements of the governing facility or job site. Before servicing or replacing an existing lock on energized enclosures such as substations or utility meters, follow applicable lockout/tagout procedures per OSHA 29 CFR 1910.147 and site-specific safety plans. Verify hasp or staple opening accommodates the 5/16-inch shackle diameter and 1 inch of clearance before installation. Set and confirm the combination before closing the shackle for the first time.