Bowmalloy BOW500002 Uss Flat Washer 3/8 Inch Steel 100pk

Product Description

The BOWMALLOY BOW500002 is a 3/8 inch USS flat washer made from steel with a Bowma-Guard finish. It is designed to distribute load across bolted connections, reducing surface damage and preventing fastener pull-through in structural and mechanical assemblies. Conforming to ASTM F436 standards, this washer carries a Rockwell C38-42 hardness rating, making it well suited for high-load applications where a softer washer would deform or fail. Licensed tradespeople in construction, mechanical contracting, and industrial maintenance reach for this type of washer daily when torquing fasteners into steel plate, channel, or structural framing.

This washer fits 3/8 inch fasteners and is sized to USS (United States Standard) dimensions, which specify a larger outer diameter than SAE equivalents for improved load bearing. It is appropriate for residential and commercial structural connections, steel fabrication, equipment mounting, and general mechanical assembly. The Bowma-Guard finish provides corrosion resistance suitable for interior and moderate-exposure applications. Each package contains 100 washers, making it practical for job-site use or shop stock replenishment.

Key Features

• Conforms to ASTM F436 fastener standard for structural applications
• Rockwell C38-42 hardness for high-load, high-torque connections
• USS sizing provides larger outer diameter than SAE for superior load distribution
• Bowma-Guard finish for corrosion resistance in moderate-exposure environments
• Grade 9 material grade for consistent mechanical performance
• Packaged in quantities of 100 for efficient field and shop use

Compatibility

Designed as an OEM-style and general-use replacement flat washer for 3/8 inch fastener applications meeting USS dimensional and ASTM F436 structural standards.

Installation Notes

Installation is performed by ironworkers, structural contractors, millwrights, and general mechanical trades. Always verify the washer grade and finish are appropriate for the load rating and environmental exposure of the connection before installing. Follow applicable building codes and torque specifications for the parent fastener being used. Do not substitute USS washers for SAE washers in applications where the outer diameter clearance is dimensionally critical.