Parts such as the Rear Brake Panel: Bolt,chain Adjust, Cam Rear Brake, Pin,cotter 4.0mm, Axle,rear Wheel are included in the Cb250k0 Australia Rear Brake Panel parts fiche.
With three applications this Nut,hex 6mm is the most specified part.
The Rear Brake Panel is made up of components including this Cam Rear Brake which is the most expensive.