With eight applications this Bolt-upset-ws,10x16 is the most specified part.
A sample from the products for the Front Hubs/brakes include: Panel-assy-brake,fr,r, Nut,18mm, Spring,brake,rh, Retainer-assy,rh.
This schematic depicts all components used in the Kaf620-e8f Mule3010 2008 Usa / 4x4 Front Hubs/brakes partslist.