The Washer-spring,18mm is the lowest priced item on this Rear Hubs/brakes schematic.
The Bolt-upset-ws,10x16 is the most widely applied product in the KAF620-PBF MULE4000 2011 USA Rear Hubs/Brakes ( eight times ).
Of all the components used in this assembly the Bracket-comp-rear Sus is the most expensive.