In this schematic the "Washer,6.5x20x1.6" is used most often.
A sample from the products for the Ignition Switch/locks/reflectors include: Nut-hex, Screw-pan Head,6x12, Reflector Reflex, Washer-plain,5mm.
The most reasonably priced component used on the Ke125-a7 Ke125 1980 Usa Canada Ignition Switch/locks/reflectors is the Washer-spring,6mm.