seventeen components are shown in this St50 Dax European Direct Sales Change Pedal - Kick Arm exploded diagram.
Parts such as the Change Pedal - Kick Arm: Pedal,gear Chang, Washer, Clip, Spring are included in the St50 Dax European Direct Sales Change Pedal - Kick Arm parts fiche.
In this schematic the "Bolt,hex 6x20" is used most often.