We supply valves parts such as valve accessories, valve bolts, valve nuts, gaskets and with cheap price and efficient service. The materials of bolts/nuts are mild steel,45# steel,40Cr,42CrMo, ASTM A193-B7, ASTM A193-B16, ASTM A194-2H, ASTM 193-B8, ASTM A194-8 and gasket is SS304+graphite and so on.