In this schematic the "Bolt,flange,6x25" is used most often.
The component with the lowest price in the OIL FILTER/OIL PAN/ OIL PUMP schematic is the Washer,plug Drain 14.
A sample from the products for the Oil Filter/oil Pan/ Oil Pump include: Bolt-washer,6x12, Pin,dowel,8x10, Gasket,oil Pan (mca), Bolt,flange,6x32.