Value Collection C85889 Uss Flat Washer 1-1/4 in Steel

Product Description

The VALUE COLLECTION C85889 is a USS flat washer designed for use with 1-1/4 inch screws and bolts. Manufactured from Grade 8 steel with a zinc-plated finish, it provides corrosion resistance and load distribution across a wide bearing surface. The washer measures 1-3/8 inches inside diameter, 3 inches outside diameter, and 5/32 inches thick. USS flat washers follow the United States Standard series, which uses a larger OD-to-screw-size ratio than SAE washers, making them suited for applications where spreading clamp load or bridging oversized holes is required. Electricians, plumbers, HVAC technicians, and general mechanical tradespeople use these in structural fastening, equipment mounting, and panel assembly tasks.

This washer is appropriate for residential and light commercial construction, mechanical equipment installation, and general maintenance applications. The zinc plating provides adequate corrosion protection for indoor and sheltered outdoor environments. It is sized to the USS standard for 1-1/4 inch fasteners, which is common in structural and equipment-mounting assemblies where a larger bearing surface is needed versus the narrower SAE profile.

Key Features

• USS series sizing provides a larger outside diameter for improved load distribution compared to SAE flat washers
• Grade 8 steel construction offers high tensile strength suitable for demanding fastening applications
• Zinc-plated finish resists corrosion in dry and sheltered environments
• 1-3/8 inch inside diameter fits standard 1-1/4 inch fastener shanks with appropriate clearance
• 3 inch outside diameter bridges oversized or countersunk holes effectively
• 5/32 inch thickness balances rigidity with low-profile fitment in tight assemblies

Compatibility

Designed as an OEM-style replacement or general-use USS flat washer for 1-1/4 inch screw and bolt applications in mechanical, structural, and equipment-mounting assemblies.

Installation Notes

Install with the appropriate 1-1/4 inch fastener using standard hand or power tools rated for the fastener size. Ensure the mating surface is clean and free of debris before seating the washer to maintain proper load distribution. For outdoor or high-moisture environments, consider a stainless steel or hot-dip galvanized washer in place of zinc-plated hardware. Follow applicable codes and fastener torque requirements specified by the equipment manufacturer or structural engineer of record.