Assembly comprising a component and a one-piece axial limit stop device (1) intended to be placed in a bore of said component in order to retain an element therein, comprising an annular ring (2) with symmetry of revolution about a central axis (I-I), and comprising at least one angular portion (3, 4) rigidly connected to the annular ring (2), developing in an arc between a first end (3a, 4a), joined to the distal end (2b) of the annular ring (2), and a second, free end (3b, 4b). The angular portion (3, 4) is in part movable from its first end (3a, 4a), in a transverse plane perpendicular to the central axis (I-I), between a retracted position and at least one protruding position, being elastically returned permanently to the protruding position. In the retracted position, the angular portion (3, 4) is included within the volume of a cylinder continuing the outer cylindrical surface of the annular ring (2). In the protruding position, the free end (3b, 4b) of the angular portion (3, 4) extends radially beyond the volume of the cylinder continuing the outer cylindrical surface of the annular ring (2). The component bore has a specific inner geometry allowing the axial limit stop device (1) to be easily attached and reliably fixed, while at the same time allowing easy detachment and extraction of the axial limit stop device (1) in order to permit the removal of the element in the event of the latter sustaining damage.
