10mm x 21mm Zinc Plated Class 8 Steel Wave Spring Lock Washers

Description

Diameter: 10mm
Diameter 2: 21mm
Thickness: 1mm
Material: Steel
Finish: Zinc
Hardness: Class 8
Style: Wave Spring
Type: Lock Washer
Specifications: DIN 137B
The purpose for a lock washer is to prevent threaded fasteners from loosening by creating friction between the fastener and the mounting surface.