Flat Key, Shaft, Flange Bolts manufacturer / supplier in China, offering M12 304 Stainless Steel Hexagonal Nut DIN934/ANSI/ASME B18.2.2 Standard (black), M10 304 Stainless Steel Hexagonal Nut DIN934/ANSI/ASME B18.2.2 Standard (black), M8 304 Stainless Steel Hexagonal Nut DIN934/ANSI/ASME B18.2.2 Standard (black) and so on.