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How far a nut or bolt travels in one full turn

Inch

The formula, 1/TPI (threads per inch), determines the distance traveled in one full turn. (Dividing the result by six tells you how far a hex fastener moves one flat at a time.)


Metric

Distance traveled in one full turn is equal to the pitch since metric pitch is determined by the distance between threads

Distance traveled same as pitch shown

Metric pitch chart 

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