Material: Carbon Steel
Hardness: 100HV / 200HV / 300HV
Surface Finishes: Plain, Blue-White Zinc Plated, Yellow Zinc Plated, Hot-Dip Galvanized, Black Oxide, Dacromet
High-Strength Black Oxide Conical Washer
Made of high-strength carbon steel with black oxide finish, combining high strength and rust resistance. Suitable for use with property class 8.8–12.9 high-strength bolts. The conical design provides reliable anti-loosening performance, compensates for settlement and wear in screw connections, and absorbs vibration and shock during equipment operation, preventing fastener loosening and failure. The black oxide finish enhances surface hardness and wear resistance. Ideal for dry, high-load, high-vibration industrial environments. Widely used in building steel structures, heavy machinery, high-voltage power equipment, and other demanding applications.