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Measuring Knurling

Measuring Knurling

Measuring Knurling

(OP)
I'm trying to determine what Diametral Pitch was used to produce the knurling on a part.  This is a "coarse" diamond knurl on a 0.945" diameter cylinder with 36 grooves around the circumference.  

So with P=N/D I end up with a diametral pitch of 38.  Correct?  Now these parts were made in Taiwan.  So metric pitch is in teeth/mm correct?  This would give me 36/24=1.5 which I believe to be a standard metric knurling pitch.

I have a customer that is measuring these same parts as a 96 diametral pitch.  How is this possible?  Am I missing something?

Thanks,
AMM, PE

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