Home / Standards / GB/T 1229-2006 GB/T 1229-2006 Abolished High strength large hexagon nuts for steel structures 钢结构用高强度大六角螺母 Standard Type GBT ICS 21.060.20 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