The Nut,flange,5mm is the lowest priced item on this Wire Harness/ Ignition Coil schematic.
This WIRE HARNESS/ IGNITION COIL assembly utilises four Bolt,washer 5x20(s) - the highest specified component.
The Wire Harness/ Ignition Coil is made up of components including this Harness,wire which is the most expensive.