Diameter: 3/16"
Diameter 2: 9/32"
Thickness: 3/64"
Material: Steel
Finish: Plain
Nominal Size: 3/16" (#10)
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.