Bolt, Torsional Shear Type Bolts, Torshear Type Bolts manufacturer / supplier in China, offering 8.8/10.9 Torsional Shear Type/Torshear Type Round Head High Strength Bolt, 8.8/10.9 Metal High Strength Hexagon Bolt, Nut and Washer, Hot Rolled Steel U/C Channel for Steel Structure Building Using and so on.