The ten Sfx50mm 1998 (w) Belgium Rear Fender component parts are all listed in this schematic.
Parts such as the Rear Fender: Screw-wash 5x12, Nut,clip 5mm, Fender,rear, Nut, Spring, 4mm are included in the Sfx50mm 1998 (w) Belgium Rear Fender parts fiche.
Of all the components used in this assembly the Fender,rear is the most expensive.