The Nut,flange,5mm is the cheapest item from this partsfiche.
Parts such as the Rear Fender: Bolt,socket,6x15, Reflex Reflector, Bolt,radiator Set, Plug,rr.fender are included in the Cb600fa Hornet 2007 (7) England / Abs Mkh Rear Fender parts fiche.
With two applications this Nut,clip,4mm is the most specified part.