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N
N
mm
mm
.
Nm

MV = Pre-tensioning torque of the locknut [Nm]

FV = Required axial pretension force of the threaded connection [N]

B = Locknut-specific allowance [N], compensates face end relief due to the locking process

A = Constant [mm], includes the calculation factors for the respective thread width (catalogue value)

µA = Frictional coefficient for the end contact surface of the locknut Approximate value μA = 0.1 steel/steel

rA = Effective friction radius for the end contact face of the locknut [mm]