The Screw,tapping,4x12 is the lowest priced item on this Meter (xl600vk/vl/vm/vn/vp/vr) schematic.
On this parts fiche the Bulb,wedge Base is the most specified component.
The Meter (xl600vk/vl/vm/vn/vp/vr) is made up of components including this Meter Assy.,combi which is the most expensive.