Home / Standards / GB/T 2673-2007 GB/T 2673-2007 Abolished hexalobular socket countersunk head screws 内六角花形沉头螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 2007-07-02 Implementation 2007-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会