<p>A fixing assembly includes a threaded fixing device including a threaded portion (3) and an unthreaded shank portion (2) whose diameter is greater than that of the threaded portion and a hollow plug (6) of expansible type. The diameter of the shank portion (2) is the same as that of the expansible plug (6) and that of the hole (5) in the workpiece (4). This permits the hole in the object piece (7) to be formed through the hole (5) in the workpiece and the expansible plug (6) subsequently to be inserted into the hole in the object piece through the hole (5) in the workpiece. <IMAGE></p>
