Parts such as the Right Crankcase Cover: Screw,cross 6x36, O Ring 63.5x2, Screw,cross 5x16, Screw Cross 6x28 are included in the Cb350k4 Italy Right Crankcase Cover parts fiche.
The thirteen Cb350k4 Italy Right Crankcase Cover component parts are all listed in this schematic.
This RIGHT CRANKCASE COVER assembly utilises eight Screw Cross 6x28(s) - the highest specified component.