Jergens FW00003 Flat Washer 3/8 Inch Uss Sae Black Oxide

Product Description

The JERGENS FW00003 is a USS/SAE flat washer designed for 3/8 inch screws and fastener assemblies across a wide range of industrial and construction applications. Manufactured from case-hardened steel with a black oxide finish, it delivers a Rockwell C60 hardness rating that resists deformation under load. The washer measures 13/32 inches inner diameter, 1 inch outer diameter, and 9/64 inches thick. It is installed by millwrights, ironworkers, pipefitters, maintenance technicians, and general contractors wherever a reliable bearing surface is needed beneath a fastener head or nut.

This flat washer suits both USS and SAE fastener standards, making it appropriate for structural connections, mechanical assemblies, and equipment mounting. The black oxide finish provides mild corrosion resistance and reduces light reflection in service environments. It is suited for indoor and covered outdoor installations where a hard, dimensionally consistent washer is required to distribute clamping load and prevent fastener pull-through.

Key Features

• Case-hardened steel construction rated to Rockwell C60 hardness for high load resistance
• Black oxide finish for mild corrosion resistance and surface protection
• Meets both USS and SAE flat washer standards for broad fastener compatibility
• 13/32 inches ID fits 3/8 inch screw diameter with standard clearance
• 1 inch OD provides effective load distribution across the bearing surface
• 9/64 inches thickness offers consistent dimensioning for tight tolerance assemblies

Compatibility

Designed for use with 3/8 inch screws and bolts conforming to USS and SAE flat washer standards in inch-measurement fastener systems.

Installation Notes

Install using standard hand tools; no specialized equipment is required for flat washer placement. Always power down or de-energize any equipment before accessing fastener assemblies in electrical or mechanical panels. Ensure the washer seat surface is clean and free of debris to maintain proper clamping load distribution. Follow applicable torque specifications for the mating fastener as defined by the equipment manufacturer or relevant industry standards.