High quality Carbon Steel Black Heavy Hex Nut low price China producer/heavy hex nuts We offer low carbon steel (mild steel), middle carbon steel, alloy steel, stainless steel and brass, aluminium alloy nuts. To meet various requirements for corrosion resistant or strength, nuts could be further treated such as heating, black oxide, zinc coating, hot dipper galvanizing, black zinc coating, brass coating, nickle and chrome plating, dacomate, etc.And we keep all kinds of nut in stock.Like DIN934,DIN6923,DIN1 587,DIN928,DIN929.Cage nut. Pls indicate this requirements with your inquiry.