Home / Standards / GB/T 70.2-2015 GB/T 70.2-2015 Abolished Hexagon socket button head screws 内六角平圆头螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 2015-12-10 Implementation 2017-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会