With a quantity of two pieces, the Collar,o Ring is the most used part in the OIL FILTER/OIL PUMP diagram.
Some items from this specific schematic: Bolt,flange,6x45, Boss, Oil Filter, O-ring,14.8x2.2, Filter Set,oil.
Of all the components that make up this Oil Filter/oil Pump the Bolt,flg.soc,6x14 has the lowest price.