Home / Standards / GB/T 801-2021 GB/T 801-2021 Active Cup head square neck bolts with small head and short neck—Product grade B 小半圆头低方颈螺栓 B级 Standard Type GBT ICS 21.060.10 CCS J 13 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会