Home / Standards / GB/T 83-1988 GB/T 83-1988 Abolished Square set screws with long dog point and rounded end 方头长圆柱球面端紧定螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 废止 Issue Date 1988-06-24 Implementation 1989-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A