Answer / hardik goswami

it is used to measure distance between two adjacent teeth of
screw or bolt or gear. it is defined as the distance between
point on tooth to the the corresponding point on next tooth.

Answer / vinod verma

the distance between parallel sides of the profiles of two adjacent thread forms measured along the axis. The pitch is usually measured along a line on which the width of the thread forms is equal to the width of the groove. Multiple threads have both a pitch and a lead; the latter is defined as the distance through which the screw is displaced in one full turn in a stationary nut, that is, the pitch of one screw line of the thread. The lead is equal to the product of the screw-thread pitch and the number of starts; for single-start threads the lead is equal to the pitch

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