CNC Machined Part, Bolts, Screws manufacturer / supplier in China, offering ASME/ANSI B 18.21.1/ISO 7089/DIN 125 Steel with Black Zinc Plated Flat Washers/Gasket, JIS B 1215 (T3) /SAE J 492 Steel Flat Head Semi Tubular Rivets/Hollow Rivets, DIN 934/ISO 4034/ASME/ANSI B 18.2.2/En 24033/BS 4190/as 1112.3/JIS B 1181 Steel Hex Nut and so on.