Of all the components that make up this Turn Signal Lamp (model T/v/w E17) the Screw has the lowest price.
Some items from this specific schematic: Gasket (nas), Spacer,fr Turnsignal Lamp, Nut, Lamp Assy,rr Turnsignal.
Of all the components used in this assembly the Lamp Assy,rr Turnsignal is the most expensive.