The Bolt(8x21) is the most widely applied product in the AN400A BURGMAN 2007 (K7) USA (E03) REAR WHEEL (AN400K7/K8/K9) ( five times ).
The O Ring(d:2,id:24.5) is the cheapest item from this partsfiche.
Check out any of the thirteen Rear Wheel (an400k7/k8/k9) components enlisted.