Steering wheel retaining nut

[red72]

Anyone know off hand what size nut I need for the steering wheel? While changing out my turn signal switch, I noticed that the treads on mine appear to be worn a bit, so now would be a great time to replace it.
Thanks!

 

[Darter6]

1/2'' fine thread

 

['68 Charger]

Anyone know off hand what size nut I need for the steering wheel? While changing out my turn signal switch, I noticed that the treads on mine appear to be worn a bit, so now would be a great time to replace it.
Thanks!

I have one if you're looking (see pics). Removed from a 1973 Plymouth Satellite. The white in the top pic is just some residue from masking tape.