General description High-quality Starlock internal toothed washers made of 65Mn steel with a black oxide coating for protection against rust and corrosion. These washers offer high hardness and good toughness, ensuring they are not easily deformed during use. They are designed to securely lock onto materials such as plastic and steel. Technical specifications Material: 65Mn steel Coating: Black oxide Sizes included: M3, M4, M5, M6, M8, M10, M12 Quantity: 340 pieces Specific counts: 50 pieces M3 x 8, 50 pieces M4 x 12, 50 pieces M5 x 12, 40 pieces M6 x 14, 40 pieces M8 x 18, 40 pieces M10 x 20, 20 pieces M12 x 25 Storage: Comes in a sturdy transparent plastic case Usage These Starlock washers are widely used in various applications, including: Machinery Furniture Household appliances Electronics Automobiles Sports equipment DIY projects Other information Examples of specific uses include repairing ice machines, lawnmowers, tricycles, toys, old pinball machines, golf bag holders,