Home / Standards / GB/T 5279-1985 GB/T 5279-1985 Active Countersunk head screws--Head configuration and gauging 沉头螺钉 头部形状和测量 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 1985-08-01 Implementation 1986-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A