Home / Standards / GB/T 808-1988 GB/T 808-1988 Active Small hexagon thin nuts--Fine pitch thread 小六角特扁细牙螺母 Standard Type GBT ICS 21.060.20 CCS J13 Status 现行 Issue Date 1988-06-24 Implementation 1989-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A