In this schematic the "Bolt,flanged,6x25" is used most often.
A sample from the products for the Breather Cover/oil Pan include: Ring-o,91.6x3.4, Gasket,oil Pan, Plug,oil Drain,12x15, Bolt,flanged,6x20.
The lowest price component in this Breather Cover/oil Pan parts-list fiche is the Bolt,flanged,6x25.