The Nut,6mm is the lowest priced item on this Gear Change Mechanism ('80 D3) schematic.
Some items from this specific schematic: Bolt, Chg Drum Positn, Lever-assy-change,ped, Rubber-change Pedal, Lever-gear Chng Drum.
This Drum Assy,gear Change is the most expensive of the items that make up this Gear Change Mechanism ('80 D3) assembly.