... make as your requirement! the nut can make as your requirement! We supply the bolts, screws ... of carbon steel, alloy and stainless steel, aluminum, brass or other special materials. For finishing, we provide black oxide, zinc ... with DIN, ANSI, AS, BS, JIS, GB, ISO or nonstandard specifications or against customers' requirements, in grades of 4.8, 6 ... , A2-70 and A4-70etc standard and non standard nut