Volvo 240 Tachometer Plug

This is the piece used when switching out the clock for a tachometer to plug the hole in the instrument cluster through which the clock's adjustment knob protruded. This model does not include the 14mm diameter rubber pad with a 6mm hole in the center that is about 4mm thick. This bit fits at the end of the plug and cushions the assembly as it sits against the tach itself. This shouldn't be hard to make out of any suitable piece of rubber or foam.