The Washer-plain-small,12 is the cheapest item from this partsfiche.
Parts such as the Frame: Nut,lock,12mm,black, Nut,lock,12mm, Seal-oil,sr31.8x37.5x, Bolt are included in the Kvf360-b6f Prairie360 2006 Usa Frame parts fiche.
On this parts fiche the Washer-plain-small,12 is the most specified component.