Parts such as the Differential: Case-gear,differentia, Washer,35.5x54x1.0, Shaft, Gear-bevel,16t are included in the Kaf620-a2 Mule2510 1996 Europe Differential parts fiche.
The component with the lowest price in the DIFFERENTIAL schematic is the Pin-spring.
This DIFFERENTIAL assembly utilises eight Bolt,8x68(s) - the highest specified component.