Master Lock Co 178D Resettable Combination Padlock

Product Description

The MASTER LOCK CO 178D is a resettable combination padlock built for applications that demand durability and field-adjustable security. The body is constructed from die cast metal with a solid brass case for strength and weather resistance, finished in black. The 4-digit combination can be reset on-site using the included change key, eliminating the need to replace the lock when access credentials change. A 1-inch hardened steel shackle with a 5/16-inch diameter provides cut resistance. At 2.24 pounds per unit, this padlock is a substantial, commercial-grade option suited to gate, locker, and equipment enclosure applications.

The 178D is appropriate for both residential and light commercial use anywhere a resettable combination lock is specified. Typical installations include storage units, utility enclosures, gates, and job site equipment boxes where keyless access is preferred and multiple authorized users may require combination changes over time. Packaged individually (sold as EA), with a package quantity of 4 per carton, making it practical for multi-unit procurement on service accounts or facilities contracts.

Key Features

• Solid brass case construction for strength and weatherability
• Die cast body with black finish
• 4-digit resettable combination — no locksmith required
• Change key included for on-site combination reset
• 1-inch hardened steel shackle with 5/16-inch shackle diameter
• Keyless operation suits shared-access and facilities applications

Compatibility

Designed as a standalone resettable combination padlock suitable for standard hasp, locker, gate latch, and equipment enclosure applications where a 2-inch padlock body is appropriate.

Installation Notes

Installation requires no specialized tools — the shackle is inserted into the hasp or locking point and closed by hand. Before resetting the combination, confirm the existing combination is known and follow the change key procedure to avoid locking out the mechanism. Inspect the shackle clearance on the hasp or locking bar before purchase to confirm the 5/16-inch shackle diameter and 1-inch shackle length are compatible with the hardware being secured. When used on exterior or exposed applications, orient the shackle opening downward where possible to reduce moisture intrusion.

Technical Specifications

• Body Width: 2 inches
• Case Material: Solid Brass
• Body Construction: Die Cast
• Finish: Black
• Shackle Length: 1 inch
• Shackle Diameter: 5/16 inches
• Shackle Material: Hardened Steel
• Combination Digits: 4
• Change Key: Included
• Unit of Measure: EA
• Package Quantity: 4
• Weight: 2.24 pounds

Standard Information

• Brand: MASTER LOCK CO
• Manufacturer Part Number: 178D