The twenty-one Gsx600f Katana 1990 (l) Usa (e03) Oil Cooler component parts are all listed in this schematic.
Parts such as the Oil Cooler: Washer(8.5x23x1.2), Cooler Assembly,oil, Bracket,oil Cooler,l, Gasket(16x22x2) (nas) are included in the Gsx600f Katana 1990 (l) Usa (e03) Oil Cooler parts fiche.
With four applications this Bolt is the most specified part.