Home / Standards / GB/T 5790-1986 GB/T 5790-1986 Active Hexagon flange bolts--Heavy series--Product grade B 六角法兰面螺栓 加大系列 细杆 B级 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 1986-01-17 Implementation 1986-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A