Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering ASTM A320 L7m Yellow Zinc Plated Stud Bolt for Low Temperature EPC Oil Gas Project, ASTM A193 B7m Full Thread Rod, Ceramic PTFE Coated, 1-1/8", 2-1/2", 3-5/8", Nace Mr0175, En 10204 3.1, Sour Service Oil & Gas, Nace Mr0175 ASTM A193 B7m Alloy Steel Stud Bolt, Zinc-Nickel Plated + PTFE / Xylan 1424 Coated, for Heavy Industry and so on.