[10 PKG] Flat Washers SAE Thru Hardened Carbon Steel Plain Made in USA 1 3/8

Flat Washers SAE Thru Hardened Carbon Steel Plain Made in USA 1 3/8 offers dependable performance for a wide range of fastening needs. This flat washer is engineered to provide a uniform bearing surface, helping to distribute load, reduce friction, and protect mating surfaces in mechanical assemblies.

Key Features

• Material: Carbon steel
• Finish: Plain (uncoated)
• Hardness: Through hardened for enhanced durability
• Size: 1 3/8 (SAE standard)
• Origin: Made in USA

Why Choose This Washer?

With a through-hardened carbon steel construction, these flat washers deliver reliable resistance to wear and deformation under heavy clamping forces. The plain finish keeps the surface simple and versatile for use in non- corrosive environments, making them a solid choice for general-purpose hardware projects, industrial equipment, and automotive applications.

Applications

Ideal for distributing load under bolt heads or nuts, preventing damage to softer materials, and maintaining consistent clamping force in mechanical assemblies, machinery, and equipment installations.

Care and Considerations

For outdoor or high-moisture applications, consider protective coatings or plating to enhance corrosion resistance, as plain carbon steel washers are not inherently corrosion-resistant.