Bolt, Screw, Nut manufacturer / supplier in China, offering A194 Gr. 7 Alloy Steel Blue PTFE Coating Bolts and Nuts Hexagon Hex Nuts, A320 L7 Thread Studs Bolt for Pipe Flange Thread Rod, L7 Alloy Steel PTFE Coating All-Thread Studs for Pipe Flange Thread Rod and so on.