钢结构栓连接用 高强度大六角头加强杆螺栓
High Strength Hexagon Fit Bolts with Large Width Across Flats for Structural Steel Bolting
预负载用高强度结构螺栓连接组件,第8部分:HV系统 - 六角头加强杆螺栓
High-strength structural bolting assemblies for preloading - Part 8: System HV — Hexagon fit bolt