Some items from this specific schematic: Washer, Plate 1832514600, Axle,wheel, Gear,drive (27t), Flange, Spacer 2.
The most reasonably priced component used on the U7e 1969 Front Wheel is the Washer(6a1).
This part-list fiche shows all the components that make up the U7e 1969 Front Wheel .