In this schematic the "Screw, Flat" is used most often.
seventeen components are shown in this Sr125 1998 3mw7 England 283mw-300e1 Oil Pump exploded diagram.
Parts such as the Oil Pump: Gear, Pump Driven 2, O-ring (341), Spring, Compression (3y1), Screw,pan Head (3hn) are included in the Sr125 1998 3mw7 England 283mw-300e1 Oil Pump parts fiche.