Home / Standards / GB/T 3229-2018 GB/T 3229-2018 Active Assembly tools for screws and nuts—Dimensions and torque testing of drive ends for hand and machine-operated screwdriver bits and connecting parts 螺栓螺母用装配工具 手动和机动螺刀头的传动端和连接部件的尺寸及扭矩试验 Standard Type GBT ICS 25.140.01 CCS J48 Status 现行 Issue Date 2018-12-28 Implementation 2019-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A