Check the listing for details. 20pcs M6 Internal Tooth Star Washers 14mm O.D.Quick Speed Washers. Condition: New. Listed at 8.53 USD. APPLICATIONLock washer fasteners are widely used for shock absorption and heat insulation in machinery and equipment, marine applications, furniture, electrical equipment, electronics, household and commercial appliances, automobile, sports equipment, industrial production, maintenance industries, etc.ABOUT THIS PRODUCTSThe internal tooth lock washer is made of 65Mn steel material, black oxidized surface treatment has better corrosion resistance in a dry environment, is not easy to deform or break, is durable and can be used for a long time. washers provide spring force between the two attachments and hold the grip shaft securely in place.SPECIFICATIONMaterial: 65Mn Spring SteelFinish: Black OxideSize: M6Fit Shaft Outer Diameter: 6mmInner Diameter: 5.4mmOuter Diameter: 14mmThickness: 1.