Parts such as the Crankcase: Bolt,stud,10x252., Bolt,flange 6x14, O Ring,11.8x2.4, Oil Seal 6x13x5 are included in the Trx500fa Fourtrax Foreman 2003 (3) Usa Mph Crankcase parts fiche.
The Washer,plain,5mm is the cheapest item from this partsfiche.
The Crankcase is made up of components including this Crankcase Comp,fr which is the most expensive.