Fastener Preload Tension Force Calculator

Fastener and Screw / Bolt Design Formula Design Data
Strength of Materials

Bolt Preload Tension Force: In the tension joint, the bolt and clamped components of the joint are pre-load designed to transfer the external tension load through the joint by way of the clamped components through the design of a proper balance of joint and bolt stiffness. The joint should be designed such that the clamp load is never overcome by the external tension forces acting to separate the joint (and therefore the joined parts see no relative motion)..

See Bolt Preload Force Equations webpage to see the equation behind this calculator.

To determine the required bolt torque see: Bolt Required Torque Calculator

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Design Variables
Tensile Shear Area of Bolt (in2, mm2) At =
Proof Strength of Bolt (lbs/in2, Pa) Sp =
Application Constant =
Bolt Preload Tension Force( lbs, N) =