The Nut,flange,5mm is the lowest priced item on this Rear Fender schematic.
A sample from the products for the Rear Fender include: Plug,rr.fender, Band U Lock, Nut,flange,5mm, Reflex Reflector.
With all the components that make up the CB600F HORNET 2008 (8) ENGLAND / MKH REAR FENDER assembly. The Nut,clip,4mm is the most frequently specified with two applications.