Stud Bolt and Nut, Copper Pipe Tube, Spiral Wound Gasket manufacturer / supplier in China, offering Stud Bolt A193 Gr B7 with A194 Gr 2h Nuts Fastener, ASME SA193 B7m Black Coated Hex Head Bolt for Pipeline, ASME B18.2.1 / B18.2.2 Alloy Steel Stud Bolt with Nuts for Flange and so on.