The most reasonably priced component used on the Ke100-a10 Ke100 1981 Canada Crankcase (ke100-a5/a6) is the Pin-dowel,8x16.
Of all the components used in this assembly the Crankcase,rh,flat Black is the most expensive.
On this parts fiche the Screw-pan Head,6x20 is the most specified component.