340 Pieces in 7 Sizes: 340 pieces internal tooth star lock washer in 7 sizes: M3 x 9 mm, M4 x 12 mm, M5 x 12 mm, M6 x 14 mm, M8 x 18 mm, M10 x 20 mm, M12 x 25 mm, enough to meet your usual needs. Sturdy and Durable: Starlock washers made of high quality 65 manganese steel, black oxide coating prevents oxidation and aging, provides good corrosion resistance and high temperature performance. Excellent Locking Function: The lock washer exerts spring force between the head of the fasteners and the substrate, creating more friction and resistance to rotation, ideal for quick repairs and making a repair. Wide Application: Widely used in machinery, furniture, electrical appliances, electronic equipment, cars, sports equipment and industrial production of shock absorption and insulation. Portable Tools: All star washers are stored in a clear plastic sorting box with a specification sheet, you can quickly find what you need, easy identification and storage. Features: -340pcs Internal Tooth Star Lock Washers in 7 sizes, M3 M4 M5 M6 M8 M10 M12, meet your different needs. -Made of high quality 65Manganese metal steel, anti-corrosion and durable. -Provides spring force, sturdy grip, creates more friction and rotation resistance. -Used in machinery, furniture, electrical appliances, electronic equipment, cars and industrial production of shock absorption and insulation. -All lock washers are stored in a clear plastic sorting box with a specification sheet, easy identification and storage. Specifications: Washer Type: Star Washer Material: 65Manganese Steel Color: Black Sizes: M3 M4 M5 M6 M8 M10 M12 Quantity: 340pcs Package Included: M3 x 60pcs M4 x 60pcs M5 x 60pcs M6 x 50pcs M8 x 50pcs M10 x 40pcs M12 x 20pcs Warm Tip: 1)Keep small items away from children. 2)Bumping during transportation may confuse small items.Welcome to meet