A193 B7, A194 2H, A320 L7, L7M Alloy Steel Fasteners, ASME B18.2.1 Boltijiet Hex ASME B18.2.2 Ġewż Hex ASME B18.22.1, Stud Bolt, Hex Bolt, Hex Bolt b'ħajt parzjali, Hex Bolt b'ħajt sħiħ, Hex Socket Thread, Sww-Bolt Ġewż Hex, Washer ċatt, Washer tar-rebbiegħa.
- Zhengzhou Huitong Pipeline Equipment Co., Ltd.