The Nut,flange,6mm is the lowest priced item on this F-30 Taillight schematic.
Some items from this specific schematic: Taillight Unit, Cord Comp.,tail, Collar,fr Fender, Bolt,hex.cap,6x25.
With all the components that make up the GL1100I 1980 (A) CANADA F-30 TAILLIGHT assembly. The Screw,tap.,4x60 is the most frequently specified with four applications.