A fastening claw has an annular section with a radial inner side, from which at least two flexible, tongue-type elements project inwards and obliquely upwards towards an upper side of the fastening claw. The tongue-type elements have free ends which define a central, open region of the fastening claw, into which region a securing element can be introduced from the underside of the fastening claw and can be clamped between the free ends of the tongue-type elements.