With my tap and die set there is a little tool called a pitch guage that is what I use to measure the threads per inch or threads per mm if it metric and I have a metric tap and die set with the magic little pitch guage.
You can use a ruler to measure the threads per inch or threads per mm if it metric.
Did I answer the question correctly?
Now for a not so serious question. how fast is the speed of time?
Norman

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norms-iron-works.tripod.com
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