JIS B 1004:1975被替代
Hole sizes before threading
出版：Japanese Standards Association
专家解读视频
基本信息
标准编号： JIS B 1004:1975
标准类别：Standard
出版单位：Japanese Standards Association
标准页数：16
标准简介
This Japanese Industrial Standard specifies the diameters of holes to be drilled before threading the following screw threads or before carrying on similar works, hereinafter referred to as the hole size before "threading". The hole sizes before threading for the thread sizes M1.7, M2.3 and M2.6 shall comply with the Appendix to this standard.
替代本标准的新标准
