<off topic>
I have a little collection of Suntour cogs that seem to spin on to a Phil and a Suzue ProMax NJS without issue, so I think they're a 'standard' thread.

The only weird thing I ever heard about Suntour stuff was that if you wanted to use a 12 cog, you need to use a special lockring for 'em.
</off topic>

They really are the best looking smoothest rolling hubs I've ever held. But I don't think they're worth the money they've been fetching on Ebay just recently.