How is metric thread pitch measured?

Answer:
Metric thread pitch is measured directly from crest to crest of the thread form.
For example the distance from crest to crest of a M8 x 1.25 MM thread would be 1.25 MM.
Another way to measure it would be linear travel per rotation, in which case a M8 x 1.25 MM thread would travel 1.25 MM each rotation.
First answer by ID1267617175. Last edit by ID1267617175. Question popularity: 16 [recommend question].