The Nut,flange,5mm is the lowest priced item on this Rear Fender schematic.
Parts such as the Rear Fender: Nut,flange,5mm, Nut,clip,4mm, Plug,rr.fender, Bolt,socket,6x15 are included in the Cb600fa Hornet 2009 (9) France / Abs Cmf 25k Rear Fender parts fiche.
The sub assemblies and components that make up this Rear Fender include this Fender,rr, the most expensive part.