The Seat assembly is constructed from several parts from which the Seat,assy Double is the most expensive.
The Washer,plain,5mm is the lowest priced item on this Seat schematic.
Parts such as the Seat: Bolt Flang 6x12, Plate,seat Catch, Spring,lock Key S, Collar,muff.mount are included in the Cb500 1996 (t) Germany / 27p Seat parts fiche.