I'm not sure I'm following what you're talking about but here's something that could be useful that I found from my fixedforum.

The lockring threads are the ones that are generally called Campy/Phil or DA, etc. Their diameters are quite different. Cogs on the other hand, should all be 1.37" x 24tpi (with the exception of some true oddballs like the French thread). The tolerances to which they are manufactured however are slightly different. I don't have a stack of hubs available, but I do have several brand new cogs. The inside thread diameter of each is as follows:

EAI = 1.330"
Campagnolo = 1.330"
Dura Ace = 1.336"
Phil Wood = 1.334"
Steelwool = 1.328"
Miche quick change = 1.332"

Bear in mind this is across the inside of the cog threads, so it is not the nominal 1.37" that is their specification (and would be the measurement across the hub threads). However, it does give some insight into why an EAI cog is a tighter fit compared to a DA cog, as would the Campy cog. That extra few thou of interference in the thread could be a problem on some hubs. They are all 24tpi thread pitch. I have put a Steelwool cog on a Miche hub with no issues, but that is only a .004" difference and it didn't spin on as easily as the Miche quick change carrier.



Not many track hubs are French or Italian threaded, most of them are ISO.