Buying a new nut

[LeperMesiah]

Hi all, I have a Music Man Sub original USA made. If the nut needs replaced, will any nut do or will it have to be an Ernie Ball specific one? Cheers guys. 

[ltownbass]

Any nut will be okay but you'll probably find that it's too wide and the string slots don't go deep enough or the nut is too tall but it will work okay.
You can sand it down to the correct width yourself and deepen the string slots if required.

If you get a luthier to fit it, he/she will use a blank (i.e. one with no string slots), cut it to size and file in some string slots of the right depth for you.