English: Diagram showing the difference between "lead" and "pitch" in screws. The lead is the axial distance the screw moves in one revolution. The pitch is the axial distance between adjacent threads. They are the same in "single-start" screws, but in "multiple-start" screws the lead is equal to the pitch muliplied by the number of "starts". Alterations to original drawing: Removed dimensioning and added colored labels
Public domain in USA - Published in USA prior to 1923
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{{Information |Description={{en|Diagram showing the difference between "''lead''" and "''pitch''" in screws. The lead is the axial distance the screw moves in one revolution. The pitch is the axial distance between adjacent threads. They are the same i