Bowmalloy BOW500100 Uss Flat Washer 1/4 in Steel 200 Pack

Product Description

The BOWMALLOY BOW500100 is a USS flat washer designed for 1/4 inch screw applications in structural and general fastening work. Made from steel with a Bowma-Guard finish, it meets ASTM F436 requirements and carries a Rockwell hardness rating of C38-42, making it suitable for high-load bearing applications. The washer features an inside diameter of 0.271 inches, an outside diameter of 0.750 inches, and a thickness of 0.073 inches. Licensed contractors, millwrights, and maintenance technicians working with structural connections will find this washer appropriate for standard load-distribution tasks where a USS-pattern flat washer is specified.

This washer fits 1/4 inch fastener assemblies in residential and light commercial construction, mechanical equipment mounting, and structural steel connections. USS flat washers provide a larger outer diameter than SAE-pattern washers, distributing clamp load over a wider bearing surface. The Bowma-Guard finish provides corrosion resistance suitable for general indoor and protected outdoor installations. This item is sold in a package quantity of 200 pieces.

Key Features

• USS pattern with 0.750 inch outside diameter for broad load distribution
• Steel construction graded to Material Grade 9 per ASTM F436
• Rockwell C38-42 hardness for high-load structural use
• Bowma-Guard finish for corrosion resistance
• 0.271 inch inside diameter fits standard 1/4 inch fasteners
• Package quantity of 200 pieces per order

Compatibility

Designed as an OEM-style replacement and general-use USS flat washer for 1/4 inch screw and bolt assemblies where ASTM F436 compliance is required.

Installation Notes

Install by qualified tradespeople following applicable structural or mechanical fastening codes. Always de-energize or depressurize the assembly before servicing fastened connections. Use calibrated torque tools when specified torque values are called out in the assembly drawing or governing specification. Do not substitute washer pattern types without verifying bearing surface requirements for the joint design.