Check the listing for details. 10pcs M8 Internal Tooth Star Washers 15mm O.D. Quick Speed Washers. Condition: New. Listed at 9.19 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 304 stainless steel material, 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: 304 Stainless SteelSize: M8Fit Shaft Outer Diameter: 8mmInner Diameter: 7.4mmOuter Diameter: 15mmThickness: 1.2mmPackage: 10 packs of ing WasherNOTEThe thickness of the product is relatively thin, be careful when installing, do not use too much force.