标 准 编 号：GB/T 15856.5-2002简体中文标题：六角凸缘自钻自攻螺钉繁体中文标题：六角凸缘自钻自攻螺钉English Name：Hexagon washer head drilling screws with tapping screw thread标准简介：本标准规定了螺纹规格为ST2.9～ST6.3的六角凸缘自钻自攻螺钉。...