the annular element 18 forms a type of collar or step the annular element 18 is formed underneath the thread 14 in the attachment direction 20 of the nut 16 on the housing 10 such that the nut 16 can rest on the annular element 18 when it is attached to housing 10 as is shown in fig4 the annular element 18 has a circumferential outer edge 22 with mating latching elements 26 which engage in latching elements 24 that are formed on the nut 16 being formed on the inner surface which faces in the direction of the thread 14 of the edge 22 of the annular element 18 the latching elements 24 and the mating latching elements 26 are in the form of latching teeth a plurality of mating latching elements 26 which are arranged alongside one another are formed in an annular shape over the entire circumferential inner surface of the edge 22 of the annular element 18 with the mating latching elements 26 being in the form of wedges at least in sections fig2 shows a detailed illustration of the mating latching elements 26 of the housing 10 in this case showing that the mating latching elements 26 each have a first section 60 and a second section 62 with the second section 62 being in the form of a wedge that is to say the longitudinal side surfaces 36 of the mating latching elements 26 are provided with a gradient gt 0 u00b0 the first section 60 or the longitudinal side surface of the first section 60 is in.