thirty-five components are listed in the schematic for this Ltf4wdx 1998 (w) Sweden New Zealand (e17 E27) Oil Pump - Fuel Pump .
Parts such as the Oil Pump - Fuel Pump: O Ring(d:2.4,id:52.6), Stud 6x16, Strainer,engine Oil, Pin(2.5x11.8) are included in the Ltf4wdx 1998 (w) Sweden New Zealand (e17 E27) Oil Pump - Fuel Pump parts fiche.
On this parts fiche the Washer (6.5x20x1.2) is the most specified component.