Midwest Fasteners Grade 8 Zinc Plated Steel USS Pattern Flat Washer

Midwest Fasteners Grade 8 Zinc Plated Steel USS Pattern Flat Washer

The Midwest Fasteners Grade 8 Zinc Plated Steel USS Pattern Flat Washer is machined from steel and zinc plated for corrosion resistance. This family spans USS sizes from 1/4" x 5/16" x 3/4" up through 1/2" x 9/16" x 1-3/8", including 3/8" x 7/16" x 1", built to USS dimensional standards and matched to Grade 8 fastener strength for demanding load-bearing joints. It is a staple for contractors, fabricators and maintenance techs needing a washer that holds up under high-torque assembly without deforming, seating properly under bolt heads and nuts to spread clamp load evenly across the work surface.

Key Features

• Size Range: Available in USS flat washer sizes from 1/4" x 5/16" x 3/4" to 3/8" x 7/16" x 1" and 1/2" x 9/16" x 1-3/8", matching common bolt diameters.
• Material & Finish: Steel construction with a Zinc Plated finish for improved corrosion resistance in general-purpose environments.
• Grade: Grade 8 rating across the family, matching high-strength bolts and cap screws used in structural and mechanical assemblies.
• Type: USS pattern flat washer, designed to distribute load and protect work surfaces under bolt heads and nuts.
• Country of Origin: Manufactured in India to consistent dimensional tolerances.

Technical Specifications

• Product Type: Flat Washer
• Product Finish: Zinc Plated
• Grade: Grade 8
• Country of Origin: India
• Product Material: Steel
• Available Sizes: 1/4" x 5/16" x 3/4", 3/8" x 7/16" x 1", 1/2" x 9/16" x 1-3/8"

Typical Applications

• Structural steel and heavy equipment assembly where Grade 8 bolts are used.
• Machinery and equipment maintenance requiring load-spreading washers under high-torque fasteners.
• General construction and fabrication projects using hex bolts, cap screws or carriage bolts across a range of sizes.
• Jobsite and shop repairs where a durable zinc plated washer is needed to protect surfaces from bolt-head marring.

Why Midwest Fasteners?

Midwest Fasteners builds this USS flat washer family to Grade 8 strength requirements with a consistent steel body and zinc plated finish, giving contractors and maintenance techs a reliable match for high-strength bolted connections across multiple sizes. Precise USS sizing across the 1/4" through 1/2" range ensures the right washer fits as expected on the jobsite or in the shop, reducing guesswork when matching washers to Grade 8 fasteners. Consistent material, finish and dimensional control across the full size range make this washer family a dependable choice for professional and serious DIY fastening work.