Abstract: The device according to the invention comprises a rigid body fast with the structure and defining a tapped bore for receiving a rod fast with the connector. This rod is externally threaded in manner complementary to the tapped bore in order to allow the distance between the connector and the structure to be freely adjusted. In order to lock the connector reliably, a rigid ring is mounted around the rod, being both free in axial translation along this rod and linked in rotation with this rod. A rigid bush for reversibly blocking the ring in abutment against the body is movably connected around this body. The invention is particularly applicable to the locking of components inside a vehicle with the fuselage of this vehicle, particularly in an aircraft.