Parts such as the Fenders: Pin,6x9, Screw, Washer,6.5x20x1.6,bla, Rod are included in the Kaf400-edf Mule600 2013 Usa Fenders parts fiche.
In this schematic the "Washer,6.5x20x1.6,bla" is used most often.
The Pin-snap,1.2x21.2 is the lowest priced item on this Fenders schematic.