The Pin-cotter,4.0x35 is the lowest priced item on this Rear Hub schematic.
Parts such as the Rear Hub: Ring-snap,220mm, Pin-cotter,4.0x35, Wheel-assy,rr, Collar,20.2x28x105.5 are included in the Vz1600 Boulevard M95 2005 (k5) California (e33) Rear Hub parts fiche.