Home / Standards / GB/T 32076.3-2015 GB/T 32076.3-2015 Active High-strength structural bolting assemblies for preloading—Part 3: System HR—Hexagon bolt with large width across flats and nut assemblies 预载荷高强度栓接结构连接副 第3部分：HR型 大六角头螺栓和螺母连接副 Standard Type GBT ICS 21.060.10;21.060.20 CCS J13 Status 现行 Issue Date 2015-10-09 Implementation 2016-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A