1/4" x 31/64" Chrome Plated Grade 8 Steel Split Lock Washers

Diameter: 1/4"
Diameter 2: 31/64"
Thickness: 1/16"
Material: Steel
Finish: Chrome
Hardness: Grade 8
Nominal Size: 1/4" (#14)
Style: Medium Split
Type: Lock Washer
Application: Nuts and Bolts

Box of 10.

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