A sample from the products for the Starter Motor (mitsuba) include: Armature Assy, Set Bolt, Screw.washer.4x8, Gear Assy.
The component with the lowest price in the STARTER MOTOR (MITSUBA) schematic is the Screw.washer.4x8.
With three applications this Screw Wash 4x28 is the most specified part.