Bowmalloy BOW500004 Uss Flat Washer 1/2 in Steel 50-pack

Product Description

The BOWMALLOY BOW500004 is a 1/2 inch USS flat washer manufactured from steel with a Bowma-Guard finish for corrosion resistance. It meets ASTM F436 fastener standards and carries a Rockwell C38-42 hardness rating, making it suitable for structural and heavy-duty mechanical applications. The washer measures 0.5260 inches inside diameter, 1.3750 inches outside diameter, and 0.1340 inches thick. Each package contains 50 washers. Licensed trades and industrial assembly crews rely on this washer where a wider bearing surface is needed to distribute load across a fastener joint.

USS flat washers are used across a wide range of commercial and industrial applications including structural steel connections, equipment mounting, and general mechanical assembly. The larger outside diameter of the USS pattern compared to SAE pattern washers makes this washer well suited for load distribution on softer substrates or where oversized clearance holes are present. This washer is appropriate for both indoor and outdoor installations where a protective finish is required to resist environmental exposure.

Key Features

• ASTM F436 fastener standard compliance for structural reliability
• Rockwell C38-42 hardness for high-load bearing capacity
• Bowma-Guard finish provides corrosion protection
• USS pattern with 1.3750 inch outside diameter for wide load distribution
• 0.5260 inch inside diameter fits 1/2 inch screw or bolt
• Packaged in quantities of 50 for jobsite or shop use

Compatibility

Designed for use with 1/2 inch screws and bolts in USS flat washer applications requiring ASTM F436 compliance and a Bowma-Guard protective finish.

Installation Notes

USS flat washers are installed by mechanical and structural trades using standard hand or power tools. Always ensure the washer is seated flush against the mating surface before torquing the fastener. Follow applicable building codes and engineer specifications for structural connections. Inspect washers for surface defects before installation in load-bearing joints.