Home / Standards / GB/T 3098.9-2020 GB/T 3098.9-2020 Active Mechanical properties of fasteners—Prevailing torque type steel nuts 紧固件机械性能 有效力矩型钢锁紧螺母 Standard Type GBT ICS 21.060.20 CCS J13 Status 现行 Issue Date 2020-03-31 Implementation 2020-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A