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Bolted Joint

Preload and tightening torque for an ISO metric bolt, how the external load splits between bolt and clamped parts, and the three checks that decide a joint: bolt overload, separation and slip. Updates as you type.

Why the preload does the work: bolted joints, explained.

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Bolt

Joint

0 mm of shank means the bolt is threaded right through the grip. Both clamped parts are assumed to be the same material.

Loads per bolt