The thirteen Cb250k3 F-15 Rear Cushion (cb-type) component parts are all listed in this schematic.
Parts such as the F-15 Rear Cushion (cb-type): Washer,plain,8mm, Washer, 10.3m/m, Bolt, Hex., 8x16, Bolt,hex,10x32 are included in the Cb250k3 F-15 Rear Cushion (cb-type) parts fiche.
In this schematic the "Stopper,seat" is used most often.