A nut (32) for assembling elements of a structure comprises a collar (64) capable of coming into contact with a front face of the structure; a tightening zone having an outer diameter (86) capable of being inserted into a hole of the structure; a deformation zone adjacent to the tightening zone and capable of forming a bulge against a rear face of the structure, opposite the front face; and a tapped portion (65) adjacent to the deformation zone.
The nut may include grooving (82) on an outer circumference of at least one part of the deformation zone, a maximum diameter of said grooving (82) being less than or equal to the outer diameter (86) of the tightening zone.