Home / Standards / GB/T 2673.2-2020 GB/T 2673.2-2020 Active Hexalobular socket high countersunk head screws 内六角花形高沉头螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 2020-03-06 Implementation 2020-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A