The Nut,hex 10mm is the cheapest item from this partsfiche.
Parts such as the Rear Wheel: Collar,wheel Side, Washer 70m/m, Washer A5,tongued, Spoke 9x159.5 are included in the Cb350k4 France Rear Wheel parts fiche.
The Rear Wheel is made up of components including this Hub,rear Wheel which is the most expensive.