ISO 3438-1975 标准详情
- 标准号:ISO 3438-1975
- 中文标题:莫氏锥柄螺纹底孔阶梯麻花钻头
- 英文标题:subland twist drills with morse taper shanks for holes prior to tapping screw threads
- 标准类别:国际标准化组织标准ISO
- 发布日期:1975-09-01
Lays down only metric dimensions, which are the only recommended dimensions in the future for subland twist drills. The drills have been designed to produce holes prior to tapping metric threads over a selected range of M 8 to M 30. Unless otherwise
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