On this parts fiche the Nut,flange,6mm is the most specified component.
Parts such as the Rear Fender: Washer,plain,3mm, Fender Comp*r134*, Rubber B Seat, Rivet,pop,3.2 are included in the Trx300ex Fourtrax 1993 (p) Canada Rear Fender parts fiche.
The Washer,plain,3mm is the lowest priced item on this Rear Fender schematic.