The Bolt,flange,6x25 is the lowest priced item on this Cylinder schematic.
seven components are shown in this Cb250rs 1980 (a) Germany / Type2 12.5kw Cylinder exploded diagram.
A sample from the products for the Cylinder include: Gasket,cylinder (mca), Ruber,insert, Cylinder Comp., Bolt,flange,6x25.