Bowmalloy KP80403-2 Uss Flat Washer 7/16 in Steel

Product Description

The BOWMALLOY KP80403-2 is a USS flat washer designed for use with 7/16 inch fasteners in structural and general mechanical assemblies. Manufactured from steel with a clear zinc chromate finish, this washer provides a corrosion-resistant bearing surface that distributes load and reduces fastener pull-through. It meets ASTM F436 fastener standards and carries a Material Grade 9 designation, making it appropriate for applications requiring verified mechanical performance. The washer measures 0.459 inches inside diameter and 1.25 inches outside diameter, with a thickness of 0.093 inches. Installation is handled by licensed tradespeople, structural mechanics, and experienced contractors.

This USS flat washer is suited for structural bolting, mechanical assembly, and maintenance applications across residential and commercial construction, HVAC equipment installation, plumbing rough-in work, and general fabrication. The USS series wide-pattern design is specified where a broader bearing area is needed versus standard SAE washers, particularly in softer substrates or oversized hole applications. Minimum order quantity is 250 pieces per package.

Key Features

• Steel construction with clear zinc chromate finish for corrosion resistance
• USS pattern provides wider bearing surface compared to SAE flat washers
• Meets ASTM F436 fastener standard for structural applications
• Material Grade 9 designation for verified mechanical performance
• Inside diameter of 0.459 inches fits 7/16 inch fasteners
• Outside diameter of 1.25 inches for broad load distribution

Compatibility

Designed as an OEM-style replacement and standard fitment USS flat washer for use with 7/16 inch screw and bolt fasteners in structural, mechanical, and general trade applications.

Installation Notes

Install using standard hand tools appropriate for the fastener size. Power down or de-energize any equipment before servicing mechanical assemblies that include this washer. Follow applicable structural or mechanical codes, including ASTM F436 torque and installation guidance for the fastener assembly. Do not reuse washers that show deformation, cracking, or corrosion damage.