a schematic perspective view of an end stop assembly 17 for a shading device 10 according to the present invention with a travelling nut 25 in an opened position travelling nuts 25 and 38 may but need not be identical the following description of travelling nut 25 applies also to travelling nut 38 the travelling nut 25 is has articulated segments more particularly it comprises two segments 45 46 which are hingedly connected by a flexible hinge 47 in this embodiment the segments 45 46 are designed as a first half 45 and a second half 46 respectively of the travelling nut 25 the flexible hinge 47 allows to flip open the travelling nut 25 for arranging the travelling nut 25 around the spindle 18 the flexible hinge 47 is according to this embodiment substantially made as a flexible plastic strip which is flexibly connected with the two halves 45 46 for engaging the travelling nut 25 around the spindle 18 the travelling nut 25 is in its open position and half 45 is arranged to the spindle 18 such that the external thread 48 of the spindle 18 mates with the internal thread 49 of the half 45 the first half 45 of.