| 摘要 |
An unscrewing-preventing system is described, comprising: a screw (1), a nut (2) and a lock nut (3), wherein the screw (1) has a first threading (a) having a first diameter and a first thread inclination, and a second threading (b) having a second diameter, smaller than the first diameter, and a second thread inclination opposite to the first inclination, the lock nut (3) being equipped with a holding chamber (c) obtained on its side in contact with the nut (2), in order to perform a seal when tightening. |
