The O Ring(d:3.1,id:16.8) is the lowest priced item on this Crankcase Cover schematic.
The Lt-f160 Quad Runner 1993 (p) Usa (e03) Quadrunner Quad-runner Crankcase Cover consists of forty-seven pieces with the Cover,clutch being the most expensive.
On this parts fiche the Bolt 6x35 is the most specified component.