<p>The invention relates to an assembly device (1) comprising an axial clamping device (2) having a rod (3) with a head (3a) and at least one threaded segment, a washer (4), and a nut (5), said device including: a means for axially receiving and retaining the nut (5) while blocking the rotation thereof; a breaking means (9) adapted so as to break beyond a predetermined clamping torque applied on the rod (3); and a means for detecting a potential unclamping.</p>
