Two-piece nut member for plastic components

A hollow element such as a rivet or a nut element for attachment to a group consisting of a composite component, such as a fiber reinforced plastic part or reinforced with a woven plastic part is presented. The element comprises a flange portion and a flange portion extending away from the shaft part, which may be formed at least at its free end than the rivet portion, said hollow member having a central passage, which is optionally provided with a thread cylinder. The hollow member is used in combination with an auxiliary tip which is either of the flange side of the element by the passage through or from the side of the free end of the stem portion or the rivet portion into the passage in such a way insertable that a tapered portion of the auxiliary peak protrudes from the free end of the stem portion or the rivet portion.