Value Collection 99771 Uss Flat Washer 1-1/4 in Steel

Product Description

The VALUE COLLECTION 99771 is a USS flat washer designed for use with 1-1/4 inch screws and fasteners. Manufactured from Grade 8 steel with a plain finish, this washer distributes load across a bearing surface to prevent fastener pull-through and reduce surface damage. With an inside diameter of 1.375 inches and an outside diameter of 3 inches, it follows USS (United States Standard) dimensional specifications, which call for a wider outer diameter relative to screw size compared to SAE washers. This part is suited for structural, mechanical, and general-purpose fastening applications where a broader load-bearing surface is required.

This USS flat washer is used in a wide range of trade and industrial applications, including HVAC equipment mounting, plumbing fixture installation, electrical panel and equipment anchoring, and general structural assembly. The larger OD relative to screw size makes it appropriate wherever fasteners bear against soft, oversized, or slotted holes. It is sold individually with a minimum order quantity of 10 pieces.

Key Features

• USS flat washer standard: wider OD-to-screw-size ratio for broad load distribution
• Grade 8 steel construction for high tensile strength and durability
• Plain finish suitable for indoor and protected installations
• 1.375 inch inside diameter fits 1-1/4 inch screw shanks with standard clearance
• 3 inch outside diameter provides wide bearing surface coverage
• Inch measurement system; compatible with standard USS fastener specifications

Compatibility

Designed for use with 1-1/4 inch screws and bolts conforming to USS flat washer dimensional standards in inch-measurement fastening systems.

Installation Notes

USS flat washers are installed by general contractors, HVAC technicians, plumbers, and electricians as part of standard bolted connections. Always ensure the washer is seated flat against the bearing surface before torquing the fastener. Use plain-finish washers only in dry or protected environments, as the uncoated steel surface is susceptible to corrosion in wet or outdoor exposures. Follow applicable mechanical and structural codes for fastener assembly torque requirements.