On this parts fiche the Bolt(6x20) is the most specified component.
Parts such as the Rear Swinging Arm: Bearing(17x40x13.25), Bearing(17x40x13.25), Bearing(17x24x25), Nut are included in the Vl800t Boulevard C50 2008 (k8) Usa California (e03 E33) Rear Swinging Arm parts fiche.
The Rear Swinging Arm assembly is constructed from several parts from which the Swingingarm Se is the most expensive.