Steering Wheel Issues

[Milduff]

Hey Everybody.....New to this site, looking for help.
Does anyone know the thread size on the steering wheel shaft on a 1970 Challenger? I am replacing every last piece of wiring in this car and I am down to Column. In removing wheel I noticed that the threads are torn up and need to be "Chased". Any idea on the size and pitch. The retaining nut is 7/8"
Thank You in advance................MOPAR FREAKS FOREVER!!!!

 

[Chryco Psycho]

I don't even have a shaft here I can check 1/2 fine makes sense but it is probably bigger like 9/16 or other obscure thread !!

 

[Big Jim]

IIRC; 9/16x18 UNF...

 

[Milduff]

IIRC; 9/16x18 UNF...

Big Jim is correct Thank you for the response. Chased threads ....all is good.

Milduff