SAR Engineering Works
Engineering Tools/Reference

Reference Desk

Bolt Torque Estimate

Torque estimate from bolt size, grade, and nut factor.

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Calculator

Bolt Torque Estimate

Preload-based torque estimate for quick planning and review.

Bolt Torque Estimate

Torque estimate from bolt size, grade, and nut factor.

referencestableLive auto output

Input console

Tuned defaults are preloaded. Edit only the dimensions you know; results refresh automatically when the inputs are valid.

1

Choose the option that matches your job setup.

Default A325
2

Choose the option that matches your job setup.

Default 3/4
3

Typical start: 0.2. Accepted range: 0.05-0.5. This value is validated before calculation.

Default 0.2
Range 0.05-0.5
4

Typical start: 75 % proof. Accepted range: 50-90 % proof. This value is validated before calculation.

% proof
Default 75
% proofRange 50-90 % proof

Material quick select

Use case

Set bolt torque targets with transparent assumptions.

Preload-based torque estimate for quick planning and review.

Trusted inputs

Preload-torque K-factor method

Range notes

Estimate only. Verify with project torque procedures.

Important

Engineering estimate only. Follow approved torque procedure for final values.

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