Lock washers add spring tension or bite beneath a fastener head or nut, helping resist loosening from vibration.
Nominal Size: #4
Inside Diameter: 7/64"
Outside Diameter: 17/64"
Thickness: 1/32"
Material: Steel
Finish: Zinc
Hardness: Grade 2
Style: External Tooth
Type: Lock Washer
Application: Round|pan|or binding head
The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.
