Home / Standards / GB/T 70.3-2008 GB/T 70.3-2008 Abolished Hexagon socket countersunk head screws 内六角沉头螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 2008-08-25 Implementation 2009-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会