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Calculate Torque of a Bolt from Required Tension:
(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)
The following is for calculating torque requirements of a bolt or threaded part from the required tension.
Nominal diameter of bolt (D - in or mm)
Required bolt tension (Tb - lbs or N)
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Torque, T =

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