Effect of Nut Height on Prevailing Torque in Screwing Process of Pitch Difference Nut

Abstract

The authors’ previous studies revealed that the bolt nut connections having pitch difference may realize fatigue life improvement and anti-loosening performance. However, the suitable pitch difference for improving the fatigue life is relatively smaller than the suitable pitch difference for improving anti-loosening performance. In other words, there is no pitch difference improving both fatigue life and anti-loosening performance. Therefore, in this paper, the effect of nut height on the anti-loosening performance is newly considered. The results show that the most suitable pitch difference for anti-loosening performance can be reduced by increasing the nut height. This nut height may realize both anti-loosening performance and high fatigue strength.