自攻螺絲之尺寸,粗牙自攻螺絲,機(jī)械性,功能性能有下列標(biāo)準(zhǔn):ANSI/ASME B18.6.4─Thread Forming And Thread Cutting Tapping Screws And Metallic Drive Screws (Inch Series)SAE J933─Mechanical and Quality Requirements For Tapping ScrewsSAE J81─Thread Rolling ScrewsSAE J1237─Metric Thread Rolling Screws 深圳市安成精密五金有限公司