USS Hot Dipped Galvanized Flat Washer

Name: USS Hot Dipped Galvanized Flat Washer
Brand: The Fastener Depot
SKU: FD345001
Price: 0.06 USD
Availability: InStock

by The Fastener Depot

Swift Shipping

Most orders leave our warehouse within 24 hours.

A hot-dipped galvanized USS flat washer in carbon steel, engineered to distribute clamping force, absorb vibration, prevent bolt pull-through, and function as a spacer in outdoor wood or metal projects.

Material & Finish: Carbon steel with a thick, hot-dipped galvanized coating for robust corrosion protection. Always use matching finishes to avoid galvanic issues.
Standard: Conforms to ASME B18.21.1 Type A (#2–3″), using SAE profiles for #2–#12 and USS for 1 5/8″–3″.
Installation: Install alongside like-finished fasteners, such as our hot-dipped galvanized hex bolts and carriage bolts.
Use Cases: Rustic deck or fence assemblies; structural steel connections exposed to the elements.

Diameter

Quantity

Flat Washer Specifications

Learn more about dimensions, mechanical properties, and surface finish in our flat washer product spec sheet:

Read our Flat Washer spec sheet.

Flat Washer Additional Resources

What’s the difference between Type A Narrow and Type A Wide flat washers?

Type A Narrow washers are commonly called SAE washers, while Type A Wide washers are known as USS washers.

Why doesn’t ASME B18.21.1 list separate dimensions for SAE and USS washers for certain sizes?

For sizes smaller than ¼″ and larger than 1½″, ASME B18.21.1 gives only a single set of dimensions (it doesn’t specify “SAE” or “USS”). Instead, industry convention dictates which style applies to each range.

Which sizes are designated SAE (Type A Narrow) vs. USS (Type A Wide) by industry convention?

Washers from #2 up through #12 are treated as SAE (Type A Narrow) washers. Washers from 1 5/8″ up through 3″ are treated as USS (Type A Wide) washers.

Refund Policy

We offer a straightforward 30-day return policy for most unused items in their original condition. If something's not right, we'll work with you to make it right. Read our full refund policy.