Parts such as the Cylinder: O Ring,61.8x2.0, Cylinder Comp., Insulator,cable, Dowel,pin,14x20 are included in the Cb250n 1980 (a) England Cylinder parts fiche.
The seven Cb250n 1980 (a) England Cylinder component parts are all listed in this schematic.
On this parts fiche the Dowel,pin,14x20 is the most specified component.