They say the devil is in the details. I am getting ready to put the dash in my 67 Coronet Convertible. I started looking for the jamb nuts to attach the radio to the dash thru the knobs. I only had 1 nut. So I have tried hardware stores, auto parts stores, electrical supply houses and local friends. No one has these nuts. My last choice is to try to go to the local wrecking yards to find it. But it is unlikely they will have any cars old enough that still have these type f radios. Does anyone have any idea where I can get these nuts (see photo attached)?