Some items from this specific schematic: Bolt,flanged,6x25,blk, O Ring,14mm, Exchanger-assy-heat,b, Bolt,flanged,6x20,blk.
The Oil Cooler assembly is constructed from several parts from which the Exchanger-assy-heat,b is the most expensive.
On this parts fiche the Bolt,flanged,6x20,blk is the most specified component.