Fastener, Hex Bolts, Stainless Steel Bolts manufacturer / supplier in China, offering High Strength Full Thread ASTM A193 B7/B8//B16 Threaded Bars, A193 B7 Heavy Hex Nut & Stud Bolt Assemblies. for Buildings, Metric Size M3-M12 Hex Toothed Nut K-Lock K Nut and so on.