Home / Standards / GB/T 6178-1986 GB/T 6178-1986 Active Hexagon slotted and castle nuts，style 1--Product grades A and B 1型六角开槽螺母 A和B级 Standard Type GBT ICS 21.060.20 CCS J13 Status 现行 Issue Date 1986-01-17 Implementation 1986-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A