Value Collection 31312 Uss Flat Washer 1-1/4 in Steel

Product Description

The VALUE COLLECTION 31312 is a USS flat washer designed for use with 1-1/4 inch screws and bolts. Made from steel with a zinc-plated finish, this washer distributes load across the fastener bearing surface to reduce pull-through and protect the mating material. It carries a 1-3/8 inch inside diameter, a 3 inch outside diameter, and a thickness of 0.136 inches. The zinc coating provides a baseline level of corrosion resistance for general indoor and light outdoor fastening applications. Licensed tradespeople and general contractors install these washers as standard hardware in structural, mechanical, and equipment-mounting assemblies.

This washer suits residential and commercial fastening applications where a USS-pattern flat washer is specified. USS flat washers have a larger outside diameter relative to the screw size compared to SAE washers, making them the preferred choice when additional load-bearing surface is needed under a nut or bolt head. Typical uses include wood framing connections, equipment bases, utility brackets, and general mechanical assemblies that call for a 1-1/4 inch fastener. The zinc-plated finish is appropriate for dry or low-humidity interior environments.

Key Features

• USS pattern provides a larger bearing surface than SAE equivalent for improved load distribution
• Steel construction delivers reliable strength for general fastening applications
• Zinc-plated finish adds baseline corrosion resistance for interior use
• 1-3/8 inch inside diameter fits 1-1/4 inch screw and bolt shafts with standard clearance
• 3 inch outside diameter spreads clamping load over a wide surface area
• 0.136 inch thickness meets standard USS flat washer dimensional requirements

Compatibility

Designed as a USS-pattern flat washer for use with 1-1/4 inch fasteners in standard inch-measurement assemblies.

Installation Notes

Install flat washers with the correct fastener torque per applicable mechanical or structural specifications for the assembly. No special tools are required beyond a standard wrench or socket set sized for the mating nut or bolt head. Inspect the washer seating surface for burrs or debris before installation to ensure full, even contact. For outdoor or corrosive environments, a higher-grade corrosion-resistant finish should be selected instead of zinc plating.