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About coarse and fine pitch threads

【英】困ったときの知恵袋詳細
Cutting TapsRoll (Forming) TapsRound Dies Metric Threads Standard (Screw Threads, Center Holes)
I work for a tool agency, and one of my customers has requested a spiral fluted tap for machining an M8 thread in a blind hole in steel. Looking at the catalog under the M8 section, I see various pitches such as 1.25, 1, and 0.75. Which one should I order?
In this case, based on the ISO standard, a coarse pitch tap with a pitch of 1.25 would be appropriate. However, please double-check to make sure this pitch meets the customer's needs.
For metric threads, there are coarse and fine pitch threads. For coarse pitch threads, the pitch is fixed for each nominal diameter. Please see the details below.

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