The Washer-spring,6mm is the lowest priced item on this Turn Signals ('73-'75 D/e/f & '7 schematic.
The Turn Signals ('73-'75 D/e/f & '7 assembly is constructed from several parts from which the Bracket-signal Lamp is the most expensive.
Check out any of the seventeen Turn Signals ('73-'75 D/e/f & '7 components enlisted.