Well, it's not my hub any more. But it's the threads on the hub for the cog, not the lockring. The guy that bought the wheels wants a partial refund because the stripped the cog off the hub.

He removed my cog/lockring, and noted that it was greased nicely, then installed his cog/lockring. Going down a steep hill, he tried to skid (brakeless) and stripped the hub. I told him that it sounded like the lockring was not tight enough, but he's looking to blame someone other than himself.