Home / Standards / GB/T 2670.3-2004 GB/T 2670.3-2004 Abolished Hexalobular socket raised countersunk(oval)head tapping screws 内六角花形半沉头自攻螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 2004-02-10 Implementation 2004-08-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会