The Nut is the lowest priced item on this Throttle Grip - Handle Switch schematic.
Parts such as the Throttle Grip - Handle Switch: Grip,throttle, Button, Screw, Grip are included in the T125ii 1971 (r) Usa (e03) Throttle Grip - Handle Switch parts fiche.
The T125ii 1971 (r) Usa (e03) Throttle Grip - Handle Switch consists of sixteen pieces with the Lever,clutch being the most expensive.