1923 TOURING (probably does not matter)
Thank you, Paul in Tacoma
Paul what is the question? The steering wheel does not use a castle nut. On the bottom end the pitman arm is secured with a 1/2" 20 castle nut.
I am sorry that my question did not get posted ,but you answered it anyway, I needed the size on the castellated nut at the bottom of the steering shaft where it attaches the pitman arm.
Glad to help. This from is a great resource. I learn stuff here all the time.
Paul, the pitman arm is supposed to have a castle nut. I believe it's a 1/2 20 nut but, I could be wrong.