Fastener Torque & Preload

Calculate required tightening torque based on clamping force, size, and friction factor.

Inputs

Formulas used:
Tensile Area (As) = π/4 × (D - 0.9743/n)²
Target Preload (F) = As × (Yield × %)
Torque (T) = K × D × F

Results

Required Tightening Torque
0 ft-lbs
Tensile Stress Area
0.000 in²
Target Preload Force
0 lbs