Home / Standards / GB/T 5784-1986 GB/T 5784-1986 Abolished Hexagon head bolts--Reduced shank--Product gradeB 六角头螺栓 细杆 B级 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 1986-01-17 Implementation 1986-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A