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Tightening torque

Diagram: Mô men siết và lực kẹp Tightening torque
Thread type

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Input

Design axial force
FaF_a
Nominal thread diameter
dd
Coefficient of friction on the thread
μsμ_s
Coefficient of friction under the head
μwμ_w

Result

Nut factor (approximate)
KK
Tightening torque
TT

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Tightening torque — Bolt Tightening Torque Calculator | Updraft - Mechanical Engineering Calculators