Of all the components that make up this Crankcase (km100-a1/a2) the Pin-dowel,8x16 has the lowest price.
Some items from this specific schematic: Bearing-ball,#6005c3, Bushing,l=23.5, Plate-position, Bearing-ball,#6004c3.
On this parts fiche the Screw-pan Head,6x20 is the most specified component.