On this parts fiche the Screw-pan Head,6x20 is the most specified component.
Of all the components that make up this Crankcase (ke100-a7/a8/a9/a10) the Pin-dowel,8x16 has the lowest price.
Some items from this specific schematic: Pin,dowel,8x16, Screw-pan Head,6x12, Ring-o,100mm, Plate-position.