The lowest price component in this 26a - Rear Wheel Spindle parts-list fiche is the Screw.
This 26A - REAR WHEEL SPINDLE assembly utilises six Nut, Flange M10x1(s) - the highest specified component.
Some items from this specific schematic: Nut, Nut, Flange M10x1, Screw, Screw Tceif M6x18 10.9.