The Nut,flange,6mm is the lowest priced item on this F-6 Front Fender schematic.
This F-6 Front Fender diagram displays the required parts for the Xl100s 1983 (d) Canada F-6 Front Fender.
Some items from this specific schematic: Plug,fr.fender, Clamp, Fender.fr.*r-110*, Nut,flange,6mm.