ASTM Bolt Torque / Preload Calculator

Thread Size UNC ASTM Designation (+) Torque Tolerance % (-) Torque Tolerance % Thread μ (min) Thread μ (max) Head μ (min) Head μ (max) Specified Torque in-lb

Diameter in TPI Tensile Area in² Proof Stress psi Yield Stress psi Tensile Stress psi Proof Load lb Yield Load lb Tensile Load lb Minimum Preload lb Maximum Preload lb Preload / Proof Load max Preload / Min Tensile max Nut Factor K