Calculators & Converters

Tightening Torque and Preload with Nut Factor (Inch)

Determine the tightening torque and preload using the nut factor K for imperial screws.

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The calculator is based on the formula T = K × F × d, where (T) is the tightening torque, (K) is the nut factor, (d) is the nominal diameter of the bolt, and (F) is the preload. The nut factor K accounts for various factors such as materials, surface finishes, plating, coatings, and lubricants.

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