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Class 2, 6H internal thread and a tap P class

【英】困ったときの知恵袋詳細
Cutting Taps Standard (Screw Threads, Center Holes)
Is it possible to process a 6H internal thread and a second grade internal thread with the same YAMAWA standard grade cutting tap?
Yes, of course you can process both threads with the same YAMAWA standard
grade tap. The YAMAWA standard grade of cutting tap is ground for processing a 6H
internal thread and second class internal thread. Below, I listed one example of the
pitch diameter tolerance range of the grade 6H internal screw thread and the second
internal screw thread. I have also listed the tap grade and the gauge position
relationship, so please take a look at the reference.

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