Antitheft locking device

An antitheft locking device (11), for fixing a wheel to a motor vehicle hub, made in form of a nut or bolt, comprising a body (13) provided with engagement means (21) for a complementary key by means of which it is possible to rotate said device, and an associated bushing (19) freely rotatable around said body (13), in which at least a radial seat (25) is provided for at least a retaining element (23) capable of preventing the axial withdrawal of the bushing (19) from the body (13), said seat being obtained partially in the body (13) of the device and partially in the bushing (19), wherein that said seat (25) has a depth varying along the axial direction,

• wherein when the antitheft device (11) is assembled, the retaining element (23) is housed in a distal portion of said seat (25) with respect to an abutment area (27) for the bushing, said distal portion being radially defined around the body (13), partially in the body (13) of the device (11) and partially in the bushing (19), whose size is such as to substantially prevent any radial movements of the retaining element (23),
• wherein said seat defines a proximal portion of said seat with respect to the abutment area (27) inside which the retaining element (23) is temporarily housed during the assembly of the bushing (19) on the body (13), and
• wherein said element (23) is housed with a certain radial clearance.