Parts such as the Crankcase Cover: Cover, Crankcase 1, Screw, Pan Head (n151), Screw, Pan Head (713), Plug, Oil Level are included in the Yl2 1967 1968 Usa Crankcase Cover parts fiche.
thirty-one components are shown in this Yl2 1967 1968 Usa Crankcase Cover exploded diagram.
In this schematic the "Screw Pan Head" is used most often.