Home / Standards / GB/T 197-2018 GB/T 197-2018 Active General purpose metric screw threads—Tolerances 普通螺纹 公差 Standard Type GBT ICS 21.040.10 CCS J04 Status 现行 Issue Date 2018-03-15 Implementation 2018-10-01 Responsible Dept 国家标准委 Drafting Unit N/A