Stewart Fastener J25WUSSZ 1/4 Uss Flat Washers Zinc Jar 100

Product Description

The STEWART FASTENER J25WUSSZ is a jar of 100 zinc-plated USS flat washers sized for 1/4 inch fasteners. USS flat washers feature a larger outer diameter than SAE-pattern washers, distributing clamp load over a wider bearing surface and reducing pull-through on softer materials. The zinc plating provides a baseline layer of corrosion resistance suitable for general indoor and light-duty outdoor applications. Each jar contains 100 washers and is sold per each jar, making it a practical bench or truck stock item for service technicians and installers working across HVAC, plumbing, electrical, or general mechanical assembly.

These USS flat washers are used wherever a 1/4 inch bolt or screw requires a wider load-bearing surface than a standard SAE washer provides. Common applications include equipment mounting, sheet metal assembly, conduit strut work, and general hardware fastening in residential and light commercial settings. The USS sizing pattern is widely specified in mechanical and utility installations where broader surface coverage is needed to prevent fastener heads or nuts from pulling through or marring the mating material.

Key Features

• USS flat washer pattern provides a larger outer diameter for improved load distribution compared to SAE equivalents
• Zinc plating offers corrosion resistance for general-purpose and light outdoor use
• Sized for 1/4 inch fasteners, compatible with standard 1/4 inch bolts, screws, and nuts
• Jar of 100 washers supports efficient bench stocking and field replenishment
• Sold per jar, with clear quantity count for inventory tracking

Compatibility

Designed as a general-purpose USS-pattern flat washer for use with 1/4 inch fasteners in standard mechanical, electrical, and HVAC assembly applications.

Installation Notes

Flat washers are installed by general contractors, HVAC technicians, electricians, and plumbers as part of standard fastening assemblies. Always power down or de-energize equipment before working near electrical connections. Select the appropriate washer pattern and material grade for the environment and load requirements of the application. Do not substitute washers in structural or pressure-rated connections without verifying the correct specification.

Technical Specifications

• Fastener Size: 1/4 inch
• Washer Pattern: USS
• Finish: Zinc Plated
• Quantity per Jar: 100
• UPC: 662352112123

Standard Information

• Brand: STEWART FASTENER
• Manufacturer Part Number: J25WUSSZ