Stainless Hex Bolts, Stainless Carriage Bolts, Stainless Lag Screw manufacturer / supplier in China, offering ASTM A193 B7 DIN976 Heavy Duty Metric Stud Bolts with ASTM A194 Heavy Hex Nuts, ASTM A193 Gr B8m B7 L7 Automotive Double End Long Threaded Stud Bolts with 2 Heavy Hexagonal Nuts, M36 M40 B7 L7 Double Left Right Thread Long Cylinder Stud Bolt with 2 Nuts Material A192 B7/A194-2h and so on.