A sample from the products for the Taillight (km100-a6/a7) include: Washer-plain,6mm, Bracket,license, Nut,6mm, Screw,pan Head,4x40.
Of all the components used in this assembly the Tail Lamp is the most expensive.
The most reasonably priced component used on the Km100-a4 1979 Usa Canada / Mph Kph Taillight (km100-a6/a7) is the Washer-plain,6mm.