Nominal Size: #4
Inside Diameter: 7/64"
Outside Diameter: 17/64"
Thickness: 1/32"
Material: Stainless Steel
Hardness: 18-8
Style: External Tooth
Type: Lock Washer
Application: Round|pan|or binding head
Diameter 3: 13/64"
Box of 50.
The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.
