i was looking for a special nut, key for our ef series. is there some out there. or if any body can tell me what the size is.

 

???? are you talking about using a lock nut for wheels as your steering wheel nut? Worried about someone stealing your steering wheel?

 

yes correct.

 

I have never heard of one and I am not sure of the thread size and pitch.

Just take yours off and take it to a hardware store, napa, parts store and you should be able to find what size it is.

Then buy a set of lock nuts of the same size.