The Washer,plain, 6mm is the cheapest item from this partsfiche.
The eighteen Gl1200a Goldwing Aspencade 1984 (e) Usa California Seat component parts are all listed in this schematic.
Parts such as the Seat: Seat.comp.*type-1, Bolt Flang 6x12, Bolt Assy Socket., Stay,seat Up are included in the Gl1200a Goldwing Aspencade 1984 (e) Usa California Seat parts fiche.