ISO 3439:2003 直柄螺纹底孔阶梯麻花钻头

标准编号：ISO 3439:2003

中文名称：直柄螺纹底孔阶梯麻花钻头

英文名称：Subland twist drills with cylindrical shanks for holes prior to tapping screw threads

发布日期：2003-09

标准范围

ISO 3439:2003规定了带圆柱柄的带底麻花钻在攻丝螺纹前的孔尺寸。这些钻头的设计目的是在攻丝公制螺纹（粗螺距系列）之前在选定的M3到M14范围内钻孔。ISO 3439:2003是对ISO 2306的补充。

ISO 3439:2003 lays down the dimensions of subland twist drills with cylindrical shanks for holes prior to tapping screw threads. The drills have been designed to produce holes prior to tapping metric threads (coarse pitch series) over a selected range of M3 to M14. ISO 3439:2003 complements ISO 2306.

标准预览图