... DIN558 DIN601 ISO4014-4018 JIS1180 ANSI/ASME B 1 STAINLESS STEEL HEXAGON HEAN BOLTSStandard:GB/T5780-5786 GB/T30 ... , nuts, rods, studs, washers and many other hardware products, made of carbon steel, alloy and stainless steel, aluminum, brass or other special ... 3, phosphate, mechanical galvanization, hot dip galvanization, Dacromet and other kinds. The products are produced in conformity with ...