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Bolt Torque Calculator

Calculate tightening torque for metric bolts based on clamp load, thread pitch, and friction coefficient.

Updated Apr 2025
Dan RileyVerified

BEng Mechanical Engineering (Hons), CMIOSH, LEEA Member

Mechanical engineer and certified lifting equipment examiner with 18 years in heavy industry, structural steelwork, and crane operations across construction and resources sectors.

Updated
1 April 2025

Professional verification required

These calculations are provided for estimation and educational purposes only. Results must be verified by a suitably qualified and licensed engineer before use in any design, specification, or construction context. Numly accepts no liability for decisions made on the basis of these results.

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