9/16" x 31/32" Chrome Plated Grade 8 Steel Split Lock Washers (10 pcs.)

Diameter: 9/16"
Diameter 2: 31/32"
Thickness: 5/32"
Material: Steel
Finish: Chrome
Hardness: Grade 8
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.