How Far a Nut or Bolt Travels in One Full Turn

Determining the Difference Depending for an Inch vs. a Metric Bolt


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.


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

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