Home / Standards / GB/T 15856.5-2023 GB/T 15856.5-2023 Active Hexagon washer head drilling screws with tapping screw thread 六角凸缘自钻自攻螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 2023-05-23 Implementation 2023-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A