3/8 Inch USS Thick Flat Washer Pack, 100 Count, 1 Inch Outer Diameter, 7/16 Inch Inner, Zinc Plated Steel, Built Tough For Heavy Duty Use, Meets ASME B18.21.1 Industrial Grade

100-Pack 3/8 Inch USS Flat Washer, 1 in OD, Zinc Plated
✔️ OD 1 in, ID 7/16 in, thickness 0.064-0.104 in, 100 washers

These USS flat washers are built for heavy-duty hardware setups, offering a thicker profile than SAE washers and enhanced load distribution. Zinc plating provides moderate corrosion resistance, making them suitable for general industrial use and assembly work. Packaged in the USA and tested to meet ASME B18.21.1 standards, they’re ready for your next project.

✅ Size: 3/8 in; Outer Diameter: 1 in; Inner Diameter: 7/16 in; Thickness: 0.064-0.104 in
✅ Material: low carbon steel with zinc plating for corrosion resistance
✅ Type: USS flat washer, thicker than SAE standard
✅ Quantity: 100 washers per package; Meets ASME B18.21.1

💡 What is a flat washer used for in heavy-duty hardware and why choose zinc-plated USS style?

Flat washers distribute load, protect surfaces, and help maintain fastener integrity in tough assemblies.

- Distributes load across the bolt area to prevent damage and loosening.
- Provides a smooth bearing surface to prevent galling and wear.
- Zinc plating adds corrosion resistance for longer life in dry to mildly damp environments.
- USS standard sizing ensures compatibility with common bolts and nuts.