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# How is metric thread pitch measured?

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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.
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