Home / Standards / GB/T 78-2007 GB/T 78-2007 Active Hexagon socket set screws with cone point 内六角锥端紧定螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 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