The Nut, Flang, 10mm is the lowest priced item on this Alternator schematic.
Some items from this specific schematic: Bolt,flange,6x22, Flywheel, Bolt,flange,sh,6x14, Bolt Flang 6x20.
The twelve Nc50 Express 1982 (c) Usa Alternator component parts are all listed in this schematic.