A193 B7, A194 2H, A320 L7, L7M Legierungsstahl Befestigungen, ASME B18.2.1 Hex Bolts ASME B18.2.2 Hex Bolt ASME B18.22.1, Bolt Bolt, Hex Bolt, Hex Bolt with partial thread, Schraube, Hexmutter, Flat Washer, Spring Washer.
- Zhengzhou Huitong Pipeline Equipment Co., Ltd.