5/8" x 1-3/32" Polished 18-8 Stainless Steel Lock Washers

Diameter: 5/8"
Diameter 2: 1-3/32"
Thickness: 3/16"
Material: Stainless Steel
Finish: Polished
Hardness: 18-8
Style: Medium Split
Type: Lock Washer

Box of 5.

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