Home / Standards / GB/T 32.3-2020 GB/T 32.3-2020 Active Hexagon bolts with wire holes on head—Fine pitch thread 六角头头部带孔螺栓 细牙 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会