Check the listing for details. 150 Pcs M5 Star Internal Tooth Lock Washers Manganese Steel Locking Washers. Condition: New. Listed at 11.12 USD. Star internal tooth lock washers are essential fastening components designed to prevent loosening, widely used in machinery, furniture, electrical appliances, devices, cars, sports equipment, and industrial production of shock absorption.SpecificationColor: BlackMaterial: Manganese SteelAdaptable Bolt Size: M3Inner Diameter: 5 mm / 0.2 inchOuter Diameter: 14 mm / 0.55 inchPacking List: 150 x Internal Tooth Lock WashersAdvantageMaterial: Made of Manganese Steel, which provides anti-rust properties, wear resistance, oxidation resistance, high strength, and long service time.Feature: Star internal tooth lock washers feature radial teeth that create more friction and rotational resistance between the fasteners and substrate for superior locking capability.