Home / Standards / GB/T 6561-2014 GB/T 6561-2014 Active Cross recessed countersunk head thread rolling screws 十字槽沉头自挤螺钉 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 2014-06-24 Implementation 2015-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A