The most reasonably priced component used on the Z50j Monkey 1993 (p) General Export Kph Csw Rear Wheel (z50jn/jp/jt) is the Washer,plain, 6mm.
On this parts fiche the Nut,flange 8mm is the most specified component.
The sub assemblies and components that make up this Rear Wheel (z50jn/jp/jt) include this Hub Set,rr*nh35m*, the most expensive part.