A sample from the products for the Frame include: Pin-cotter,2.0x15, Nut,lock,flanged,10mm, Pin,cotter,2.5x18, Clamp.
This part-list fiche shows all the components that make up the Klf220-a2 Bayou220 1989 Usa Frame .
In this schematic the "Pin-cotter,2.0x15" is used most often.