Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering Carbon Steel HDG Stud Bolt Manfuaturer Zinc Nickle Plated with PTFE Coating Stud Bolt M20 1meter Hot DIP Galvanized A193b7 Thread Rod for Oil &Gas Industry, New Arrivals Zinc Nickle Plated with PTFE Coated Green Xylan1424 Thread Rod for Oil&Gas Industry 1/2 3/8 1/4 1-1/2 Stud Bolt, Factory Production ASTM Black Oxide DIN975 Thread Rod for Oil&Gas Industry DIN976 API-20e Galvanized A193b7 Stud Bolt and so on.