An assembly comprising: - at least one structure comprising first and second opposing surfaces and a bore opening into each of said surfaces; and - a rivet comprising: - a screw comprising: a threaded portion , a shank and a head ; and - a socket comprising: a body , said body comprising a substantially cylindrical clamping area adapted to receive the shank of the screw, and a deformation area adjacent to the clamping area; a flange adjacent to the clamping area adapted to receive the head of the screw; and a threaded portion adjacent to the deformation area adapted to mate with the threaded portion of the screw; the screw shank having first and second cylindrical portions joined by a shoulder , the first portion being adjacent the head and having a first diameter , the second portion being adjacent to the threaded portion and having a second diameter , less than the first diameter, wherein: - the flange of the socket is in contact with the first surface ; - the head of the screw is in contact with said flange; - the deformation area of the socket body from an initial substantially cylindrical configuration is, in an installed configuration, in the form of an external bulb in contact with the second surface; and - the clamping area of the socket body has an internal bulge adjacent to the external bulb, said internal bulge being disposed opposite the second portion of the screw shank. - at least one structure comprising first and second opposing surfaces and a bore opening into each of said surfaces; and - a rivet comprising: - a screw comprising: a threaded portion , a shank and a head ; and - a socket comprising: a body , said body comprising a substantially cylindrical clamping area adapted to receive the shank of the screw, and a deformation area adjacent to the clamping area; a flange adjacent to the clamping area adapted to receive the head of the screw; and a threaded portion adjacent to the deformation area adapted to mate with the threaded portion of the screw; - a screw comprising: a threaded portion , a shank and a head ; and - a socket comprising: a body , said body comprising a substantially cylindrical clamping area adapted to receive the shank of the screw, and a deformation area adjacent to the clamping area; a flange adjacent to the clamping area adapted to receive the head of the screw; and a threaded portion adjacent to the deformation area adapted to mate with the threaded portion of the screw; the screw shank having first and second cylindrical portions joined by a shoulder , the first portion being adjacent the head and having a first diameter , the second portion being adjacent to the threaded portion and having a second diameter , less than the first diameter, wherein: - the flange of the socket is in contact with the first surface ; - the head of the screw is in contact with said flange; - the deformation area of the socket body from an initial substantially cylindrical configuration is, in an installed configuration, in the form of an external bulb in contact with the second surface; and - the clamping area of the socket body has an internal bulge adjacent to the external bulb, said internal bulge being disposed opposite the second portion of the screw shank. - the flange of the socket is in contact with the first surface ; - the head of the screw is in contact with said flange; - the deformation area of the socket body from an initial substantially cylindrical configuration is, in an installed configuration, in the form of an external bulb in contact with the second surface; and - the clamping area of the socket body has an internal bulge adjacent to the external bulb, said internal bulge being disposed opposite the second portion of the screw shank. <EOS>