Bulk USS Flat Washers – Medium Carbon Thru-Hardened, Plain Finish, Made in USA – Monster Bolts TEK Screws General light-to-medium duty hollow wall

General light-to-medium duty hollow wall anchoring

Integrated Washer Flange: Wide bearing surface distributes load—eliminates the need for a separate washer

Mounting brackets or furring strips to masonry

Smoother Installs: Trilobular profile plus wax top-coat reduces friction for lower drive torque

Bulk USS Flat Washers – Medium Carbon Thru-Hardened, Plain Finish, Made in USA – Monster Bolts TEK Screws General light-to-medium duty hollow wallMonster Overview Fix your project right the first time with USS Flat Washers Medium Carbon Thru Hardened, Plain Finish from Monster Bolts. These USA made USS pattern washers feature a larger outside diameter than SAE washers, making them ideal for construction, general fabrication, machinery repair, and heavy duty industrial applications. Built from medium carbon thru hardened steel, these washers provide a strong, consistent load bearing surface