1/4" x 1/2" 316 Stainless Steel Lock Washers

Diameter: 1/4"
Diameter 2: 1/2"
Thickness: 1/16"
Material: Stainless Steel
Hardness: 316
Style: Medium Split
Type: Lock Washer

Box of 30.

The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.