Partially threaded screw for mounting retaining ledge and insulating board on ledge-substructure, is provided with screw shaft having screw head and threaded part spaced from screw head

摘要

The partially threaded screw (1) is provided with a screw shaft (3) having a screw head (2) and a threaded part (4) spaced from the screw head. The screw shaft is provided with embossing between the screw head and threaded part. The embossing (5) imitates the windings, which are generated by single elevations formed at the screw shaft.