Home / Standards / GB/T 1228-2006 GB/T 1228-2006 Abolished High strength bolts with large hexagon head for steel structures 钢结构用高强度大六角头螺栓 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 2006-03-27 Implementation 2006-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会