Home / Standards / GB/T 39641-2020 GB/T 39641-2020 Active Methods for gaging fastening screw threads by thread indicating gages 螺纹指示量规检测紧固螺纹方法 Standard Type GBT ICS 21.040.01 CCS J04 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 国家标准委 Drafting Unit N/A