T = (0.5 ~ 0.7) * k * σs * Nka * d / 1000
Muri bo,
T: gukaza umuriro, Nm
k: gukomera kwingufu zingirakamaro, mubisanzwe 0.12
σs: Bolt ibikoresho bitanga umusaruro, Mpa
Nka: akaga Agace kambukiranya igice, mm2
d: Diameter ya nominal, mm

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