Parts such as the Taillight: Nut,flange,5mm, Unit Assy Tail Li, Grommet,rubber, Screw-washer 4x16 are included in the Cb600f Hornet 2007 (7) European Direct Sales Taillight parts fiche.
The Screw-washer 4x16 is the cheapest item from this partsfiche.
Check out any of the nineteen Taillight components enlisted.