Home / Standards / GB/T 828-1988 GB/T 828-1988 Active Slotted pan head set screws with dog point 开槽盘头定位螺钉 Standard Type GBT ICS 21.060.10 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