The thirty-three Gl1500c Valkyrie 1998 (w) England Fuel Tank component parts are all listed in this schematic.
In this schematic the "Screw-washer,4x16" is used most often.
Parts such as the Fuel Tank: Screw-washer,5x25, Joint,t Type, Bolt,flange,8x35, Lever,fuel Cock are included in the Gl1500c Valkyrie 1998 (w) England Fuel Tank parts fiche.