Abstract: The invention relates to an attachment member (R) of the “lockbolt” type comprising a pin (100) and a ring (200), said pin (100) comprising a head (110) at one end and having, on its body, a first part (120) grooved with a plurality of locking grooves or channels (121p, 121c, 121d) enabling the ring (200) engaging with the pin (100) to attach itself thereto by deformation, and a second part (130) that is grooved in order to cooperate with a tool (O), characterized in that said grooved part (120) of the pin (100) is preformed so as to provide a series of non-helical grooves (121p, 121c, 121d), the beginning and the end of the series consisting of grooves (121p, 121d) that have different profiles from the identical grooves (121c) located in the central part of said series, the different profile having an identical depth but a greater width compared to the profile of the grooves (121c) located in the central portion of the series. The invention is applicable to the production of attachments and rivets.

Abstract: The invention relates to a riveting element (R) for riveting parts which are made from composite materials (M1 and M2) and provided with a through-hole. The invention is characterized in that it consists of: a hollow bushing (200) including, at one end, a head (210) bearing on the surface of one of the parts to be assembled and a hollow rod (220); and a semi-tubular insert (100) including a first end (110) capable of being inserted into the hollow part of the bushing (200) and an open end (130) capable of deforming in order to form an enlarged base that bears on the surface of the other part that is to be assembled once the insert (100) is translatably locked inside the bushing (200). The invention also relates to the installation tool configured for one such element.

Abstract: The invention relates to a method for making a rivet (R), of the type comprising, by deformation of the material of a substantially cylindrical metal segment, the operations of preforming a milled head (100) at the end of a rod (200), characterised in that it comprises, by deformation of the material (cold stamping) the following operations: creating a portion with a lower diameter (210) from the free end; creating a substantially cylindrical hollow core (220) for forming a tubular portion; preforming the hollow core (220) as a truncated cone; performing the lower diameter outer surface as a truncated cone. The invention also relates to the rivet obtained by said method.