The ten Cn250 Helix 1988 (j) Italy Kph Winker component parts are all listed in this schematic.
The Screw,tap.,4x12 is the lowest priced item on this Winker schematic.
A sample from the products for the Winker include: Screw,tap.,4x12, Lens Comp.,l.fr.w, Stay,fr.winker, Seal,packing.