Lock washers add spring tension or bite beneath a fastener head or nut, helping resist loosening from vibration.

Nominal Size: 7/8"
Inside Diameter: 7/8"
Outside Diameter: 1-15/32"
Thickness: 1/4"
Material: Steel
Finish: Zinc
Hardness: Grade 5
Style: Medium Split
Type: Lock Washer
Application: Nuts and Bolts
The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.