Lightweight fastener having an integral clip body made of plastic, - wherein the clip body has the basic shape of a clamp - having two opposite, longitudinally extending legs (22, 24) - and a web connecting two opposite leg ends; - having a receiving space for a plate-shaped component between the legs (22, 24), which is bounded on one side by the web; and a clip nut - which has a nut base that is substantially plate-shaped with a flat base surface facing the inside of the clamp; - and a main body supported on the nut base and a top surface and a plurality of side walls (51, 51', 52",...) extending between the nut base and the top surface; - wherein the main body has a substantially polygonal cross-section parallel to the nut base; - and a central center opening extending through the nut base, the main body and the top surface; wherein - a first leg of the clip body comprises a cage of a plurality of wall elements (31, 31', 31",...) in which the clip nut is floatingly movably mounted; - the cage has at least two retaining openings (36, 37) - the second leg is designed as a tongue-shaped, flat contact surface towards the inside of the clamp - the first leg in the region of the cage, the second leg in the region of the tongue-shaped, flat contact surface each have an opening (29, 25) which is aligned with the central center opening of the clip nut arranged in the cage, characterized in that - the first leg is designed such that the base surface of the clip nut faces the inside of the clamp and is designed as a contact surface for direct contact with the plate-shaped component; - the main body of the clip nut has at least two peg-shaped lugs (56, 57) which engage in the openings (36, 37) of the wall elements of the cage. - wherein the clip body has the basic shape of a clamp - having two opposite, longitudinally extending legs (22, 24) - and a web connecting two opposite leg ends; - having a receiving space for a plate-shaped component between the legs (22, 24), which is bounded on one side by the web; - which has a nut base that is substantially plate-shaped with a flat base surface facing the inside of the clamp; - and a main body supported on the nut base and a top surface and a plurality of side walls (51, 51', 52",...) extending between the nut base and the top surface; - wherein the main body has a substantially polygonal cross-section parallel to the nut base; - and a central center opening extending through the nut base, the main body and the top surface; - a first leg of the clip body comprises a cage of a plurality of wall elements (31, 31', 31",...) in which the clip nut is floatingly movably mounted; - the cage has at least two retaining openings (36, 37) - the second leg is designed as a tongue-shaped, flat contact surface towards the inside of the clamp - the first leg in the region of the cage, the second leg in the region of the tongue-shaped, flat contact surface each have an opening (29, 25) which is aligned with the central center opening of the clip nut arranged in the cage, - the first leg is designed such that the base surface of the clip nut faces the inside of the clamp and is designed as a contact surface for direct contact with the plate-shaped component; - the main body of the clip nut has at least two peg-shaped lugs (56, 57) which engage in the openings (36, 37) of the wall elements of the cage.