3/8" x 1/2" Plain Steel High Collar Lock Washers

Diameter: 3/8"
Diameter 2: 1/2"
Thickness: 1/8"
Material: Steel
Finish: Plain
Style: High Collar Split
Type: Lock Washer
Application: Confined Areas

Box of 96.

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