Some items from this specific schematic: Screw,cross,4x30, Bulb (12v5w), Screw,tap 5x12mm, Base Comp,license.
With a quantity of two pieces, the Collar is the most used part in the TAILLIGHT(1) diagram.
The Screw-washer 4x16 is the lowest priced item on this Taillight(1) schematic.