... bolts, screws, nuts, rods, studs, washers and many other hardware products, made of carbon steel, alloy ... and stainless steel, aluminum, brass or other special ... galvanization, hot dip galvanization, Dacromet and other kinds. The products are produced in conformity with DIN, ANSI, AS, BS, ... 9, 12.9, A2-50, A2-70 and A4-70etc standard and non standard nut