Of all the components that make up this Taillight the Nut,flange,5mm has the lowest price.
Some items from this specific schematic: Bulb (12v 5w), Bolt.flange 6x12, Rub,tail Mtg, Packing.
The twelve Trx350 Fourtrax 4x4 1987 (h) Usa Taillight component parts are all listed in this schematic.