Parts such as the Taillight: Collar, Nut,flange,5mm, Bulb (12v5w), Rubber Protector are included in the Cb600fa Hornet 2009 (9) England / Abs Mkh Taillight parts fiche.
The sub assemblies and components that make up this Taillight include this Unit Assy Tail Li, the most expensive part.
The Screw-washer 4x16 is the lowest priced item on this Taillight schematic.