On this parts fiche the Nut is the most specified component.
Parts such as the Left Rear Wheel (lt-z400l2): Flange,rr Sprocket Mounting, Sprocket,rr, Washer,rr Axle No.1, Hub,rr are included in the Lt-z400z Quad Sport 2012 (l2) Usa (e03) Quadsport Quad-sport Left Rear Wheel (lt-z400l2) parts fiche.
The Left Rear Wheel (lt-z400l2) assembly is constructed from several parts from which the Rim,rr Wheel is the most expensive.