Parts such as the Kit Carrier Brkt: Bolt,flange,8x55, Rub,tailligh Mtg., Washer Rubber, Collar B are included in the Cbf600s 2008 (8) France / Bct Cmf Kit Carrier Brkt parts fiche.
On this parts fiche the Bolt,flange,8x55 is the most specified component.
The Nut,flange,8mm is the cheapest item from this partsfiche.