... requirement! We supply the bolts, screws, nuts, rods, studs, washers and many other hardware products, made of carbon steel, alloy and stainless steel, aluminum, brass ... electroplating Cr+3, phosphate, mechanical galvanization, hot dip galvanization, Dacromet and other kinds. The products are produced in conformity with DIN ... , 8.8, 10.9, 12.9, A2-50, A2-70 and A4-70etc standard and non standard nut