Parts such as the Tail Lamp (model K3): Screw, Washer(6.5x20x1.6), Nut, Screw are included in the Gsx600f Katana 1999 (x) Usa (e03) Tail Lamp (model K3) parts fiche.
This schematic depicts all components used in the Gsx600f Katana 1999 (x) Usa (e03) Tail Lamp (model K3) partslist.