• Thru Hardened USS Flat Washers
  • USS Washers (Thru-hardened) Yellow Zinc

Thru Hardened USS Flat Washers

Thru Hardened USS Flat Washers distribute bearing pressure across a joint and help prevent loosening and surface damage. The right washer protects the joint, spreads the load, and keeps the fastener from working loose over time. South Coast Fasteners stocks Thru Hardened USS Flat Washers in a full range of sizes, grades, and finishes, with fast 3-5 day shipping.

 Product Name
Part Number
Bolt or Screw Size
Inside Diameter
Outside Diameter
Material
Finish
 
ussfltwashyz 1/4" 5/16" 3/4" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 5/16" 3/8" 7/8" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 3/8" 7/16" 1" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 7/16" 1/2" 1 1/4" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 1/2" 9/16" 1 3/8" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 9/16" 5/8" 1 1/2" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 5/8" 11/16" 1 3/4" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 3/4" 13/16" 2" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 7/8" 15/16" 2 1/4" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 1" 1 1/16" 2 1/2" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 1 1/8" 1 1/4" 2 3/4" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 1 1/4" 1 3/8" 3" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashyz 1 3/8" 1 1/2" 3 1/4" Medium Carbon Through Hardened Steel Yellow Zinc Cr+6
ussfltwashplain 1 1/2" 1 5/8" 3 1/2" Medium Carbon Through Hardened Steel Plain
ussfltwashplain 1 1/4" 1 3/8" 3" Medium Carbon Through Hardened Steel Plain
ussfltwashplain 1 3/8" 1 1/2" 3 1/4" Medium Carbon Through Hardened Steel Plain
ussfltwashplain 1 1/2" 1 5/8" 3 1/2" Medium Carbon Through Hardened Steel Plain
ussfltwashplain 1/4" 5/16" 3/4" Medium Carbon Through Hardened Steel Plain
ussfltwashplain 5/16" 3/8" 7/8" Medium Carbon Through Hardened Steel Plain
ussfltwashplain 3/8" 7/16" 1" Medium Carbon Through Hardened Steel Plain
Showing 1-20 of 27 Results
Bolt or Screw Size: 1/4"
Inside Diameter: 5/16"
Outside Diameter: 3/4"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
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Bolt or Screw Size: 5/16"
Inside Diameter: 3/8"
Outside Diameter: 7/8"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 3/8"
Inside Diameter: 7/16"
Outside Diameter: 1"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 7/16"
Inside Diameter: 1/2"
Outside Diameter: 1 1/4"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 1/2"
Inside Diameter: 9/16"
Outside Diameter: 1 3/8"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 9/16"
Inside Diameter: 5/8"
Outside Diameter: 1 1/2"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 5/8"
Inside Diameter: 11/16"
Outside Diameter: 1 3/4"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 3/4"
Inside Diameter: 13/16"
Outside Diameter: 2"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 7/8"
Inside Diameter: 15/16"
Outside Diameter: 2 1/4"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 1"
Inside Diameter: 1 1/16"
Outside Diameter: 2 1/2"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 1 1/8"
Inside Diameter: 1 1/4"
Outside Diameter: 2 3/4"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 1 1/4"
Inside Diameter: 1 3/8"
Outside Diameter: 3"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 1 3/8"
Inside Diameter: 1 1/2"
Outside Diameter: 3 1/4"
Material: Medium Carbon Through Hardened Steel
Finish: Yellow Zinc Cr+6
View Details
Bolt or Screw Size: 1 1/2"
Inside Diameter: 1 5/8"
Outside Diameter: 3 1/2"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details
Bolt or Screw Size: 1 1/4"
Inside Diameter: 1 3/8"
Outside Diameter: 3"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details
Bolt or Screw Size: 1 3/8"
Inside Diameter: 1 1/2"
Outside Diameter: 3 1/4"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details
Bolt or Screw Size: 1 1/2"
Inside Diameter: 1 5/8"
Outside Diameter: 3 1/2"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details
Bolt or Screw Size: 1/4"
Inside Diameter: 5/16"
Outside Diameter: 3/4"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details
Bolt or Screw Size: 5/16"
Inside Diameter: 3/8"
Outside Diameter: 7/8"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details
Bolt or Screw Size: 3/8"
Inside Diameter: 7/16"
Outside Diameter: 1"
Material: Medium Carbon Through Hardened Steel
Finish: Plain
View Details

Materials and Finishes

Thru Hardened USS Flat Washers come in grades matched to the load, from carbon steel through high-strength alloy and corrosion-resistant stainless, with finishes from plain and zinc through hot-dip galvanized for outdoor and washdown service. Pair them with made in the USA, fasteners, and Bolts to round out the assembly.

How to Choose

Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.

Thru Hardened USS Flat Washers Industry Applications

Thru Hardened USS Flat Washers are relied on wherever the work demands dependable, professional-grade results. Welding and construction back oversized and soft-material holes with them, while manufacturing and automotive spread clamping load and protect surfaces with them. Flat, fender, and split or tooth lock styles, including F436 hardened structural washers.

Frequently Asked Questions

What materials and finishes are thru hardened uss flat washers available in?

Thru Hardened USS Flat Washers come in grades matched to the load, from carbon steel through high-strength alloy and corrosion-resistant stainless, with finishes from plain and zinc through hot-dip galvanized for outdoor and washdown service.

What are thru hardened uss flat washers used for?

Thru Hardened USS Flat Washers see daily use across welding, construction, manufacturing, and automotive, from structural framing and heavy equipment to machinery and general repair.

How do I choose the right thru hardened uss flat washers?

Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.

Can I order in bulk or request a quote?

Yes. Stock covers small orders and full production runs. Reach out for a quote or product help.

Why Choose South Coast Fasteners?

We are a single source for fasteners, PPE, hand tools, cutting tools, abrasives, and industrial supplies, priced to compete and shipped fast by a crew that uses this gear every day. We also stock Finished Hex Nuts.