The Washer,plain, 6mm is the lowest priced item on this F-20-2 Taillight schematic.
Some items from this specific schematic: Cord,stop Light, Socket Comp.,tail, Bracket,no. Plate, Plate,b Number.
The Rubber,cushion is the most widely applied product in the XL125K3 U.S.A F-20-2 TAILLIGHT ( four times ).