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 .