Abstract: A fastening system including two components in the form of two independent fastening elements wherein a first fastening element is used to fasten a finish element such as a door panel, dashboard panel, or the like, to a vehicle body, and is first inserted through a hole in the finish element, and then fixed firmly to the vehicle body inside an opening formed in the body; and a second fastening element is used to fasten an accessory to the finish element, and is first fitted separately to the accessory, and then inserted inside the first fastening element and rotated slightly to establish a reversible connection; the first fastening element in the system is in the form of a one-piece plug made of high-mechanical-strength plastic, and the head of which has an inner cavity with two opposite symmetrical teeth projecting inwards of the cavity; the second fastening element includes an actuating body and a retaining element connected to each other beforehand through a hole formed in the accessory; and the retaining

Abstract: A clip for fastening members such as pipes or similar articles or components to a part of a support such as a vehicle frame, and of the type presenting a body with at least one partially closed seat defined by a flexible inner and outer wall substantially concentric with each other and each presenting a mouth; characterized in that the outer wall presents, a given distance from its mouth, a retaining tooth facing inwards towards the inner wall; and the inner wall presents, close to its mouth, a tooth facing outwards and away from the seat; the teeth of the inner and outer walls being positioned facing and close to each other but not mutually engaged when the clip is idle but engaging each other, if the pipe or similar article or component is involuntarily attempted to be withdrawn from the seat so as to in fact prevent such involuntary withdrawal of the pipe or similar article or component from the seat.