1/4" x 31/64" 18-8 Stainless Internal Tooth Lock Washers (20 pcs.)

Diameter: 1/4"
Diameter 2: 31/64"
Thickness: 3/64"
Material: Stainless Steel
Hardness: 18-8
Nominal Size: #14
Style: Internal Tooth
Type: Lock Washer
Application: Smaller head screws

Box of 20.

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