Lock washers add spring tension or bite beneath a fastener head or nut, helping resist loosening from vibration.
Nominal Size: 20mm
Inside Diameter: 20mm
Outside Diameter: 33mm
Thickness: 4.1mm
Material: Steel
Finish: Zinc
Hardness: Class 10
Style: Medium Split
Type: Lock Washer
Specifications: DIN 127
The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.
