With a quantity of four pieces, the Nut,flange,6mm is the most used part in the TAILLIGHT diagram.
A sample from the products for the Taillight include: Bulb,taillight, Brkt Number Plate, Screw,tap 4x25, Seal,packing.
The most reasonably priced component used on the Xl600v Transalp 1987 (h) Italy Taillight is the Screw,tap 4x25.