| 主权项 |
1. Fastening bolt comprising:
A screw, said screw comprising a head, a threaded portion disposed along a first axis and a terminal portion, said terminal portion being adjacent along the first axis to the threaded portion, said terminal portion having a diameter less than the minimum diameter of the threaded portion, an end face of said terminal portion comprising a transverse opening groove; A nut comprising a front bearing surface, a threaded body disposed along a second axis comprising a threaded chimney, and an unthreaded crown, adjacent to the threaded body along the second axis, on the side opposite the bearing surface, said crown being drilled with at least two lateral holes, diametrically opposite one another; A rod, able to fit in the groove of the screw and in the two lateral holes of the nut; said bolt being characterized in that: the nut comes from a method comprising an elliptical deformation of the threaded chimney previously in a circular shape, the ratio between the outer diameter of the chimney before deformation and the nominal diameter of the nut is between 1.30 and 1.35 inclusive; and the ratio between the height of the chimney and the nominal diameter of the nut is greater than or equal to 0.65. |
