thirteen components are shown in this Kaf300-c3 Mule550 1999 Europe Crankcase exploded diagram.
The lowest price component in this Crankcase parts-list fiche is the Screw.
A sample from the products for the Crankcase include: Pin,dowel,10x8.2x14, Bearing-ball,6306jrcm, Stud,6x14, Gasket,crankcase (nas).