Home / Standards / GB/T 13806.2-92 GB/T 13806.2-92 Fasteners for precision mechanics—Cross recessed tapping screws—Scraping end 精密机械用紧固件 十字槽自攻螺钉 刮削端 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A