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M10 Bolt Torque: Why There Is No Single Correct Value
A practical M10 bolt torque guide explaining the influence of property class, preload target, friction and bearing geometry.
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Calculate M10 preload and torque →Why M10 alone is not enough
The designation M10 defines nominal thread diameter, but it does not define one universal tightening torque. Pitch, bolt property class, target preload, thread friction, under-head friction and bearing diameter all affect the result.
A better workflow
Choose the actual pitch and property class, define a preload target appropriate to the joint, then use realistic friction values for the installation condition. Review the resulting bolt stress as well as the torque.
Do not copy a generic torque table blindly
Generic tables can be useful starting references, but they may assume lubrication and friction conditions that do not match your joint. For critical assemblies, use a validated tightening specification.
Related standards
DraftFit guides are engineering educational content and do not replace the controlled standard, project specification or responsible-engineer review.