The Nut.hex 10mm is the lowest priced item on this F-17 Pedal Kick Starter Arm schematic.
The twenty-one Xr250r 1982 (c) F-17 Pedal Kick Starter Arm component parts are all listed in this schematic.
A sample from the products for the F-17 Pedal Kick Starter Arm include: Nut,brake Adjust, Pedal Comp,change, Dust Seal, Brkke, Nut.hex 10mm.