... nut can make as your requirement! We supply the bolts, screws, nuts, rods, studs, washers and ... products, made of carbon steel, alloy and stainless steel, aluminum, brass or other special materials. For finishing, ... phosphate, mechanical galvanization, hot dip galvanization, Dacromet and other kinds. The products are produced in conformity ... 12.9, A2-50, A2-70 and A4-70etc standard and non standard nut