Alternator Battery Terminal Post

[bc3j]

Does this terminal just screw into the case? My one alternator, I suspect is many years old, has a hex 7/16 nut onto the terminal post. A rebuilt Remy alternator has a shorter terminal post with no hex nut on it only a collar next the to a nylon bushing in the case. Don't have a photo of that one.
Are these terminal posts interchangeable?
The Remy unit feels slightly loose and a has very, very minimal wobble. It's tuff to grab it without damaging the threads on the post.
Do they just thread into the case?  If so, can I lock two nuts together and tighten the terminal post?

[Rich G.]

Make sure the nut is tight on the terminal . The outer nut is just to hold the wire on.

[Mr Lee]

If I remember correctly, that terminal does not just screw into the case.  It threads into a part inside the alternator but I don't remember what it's called.  So to remove the post you have to open up the alternator and remove the piece in there that the post is attached to. 

I accidentally overtightened mine and broke that piece in there and had to bring it to an alternator rebuild guy.  I think he said it was porcelain inside... or something like that. 

[dodj]

The nut closest to the alt body tightens the stud to the alt body (but insulated from). The nut furthest from the alt body is for attaching the output wire.