Originally Posted by
thook
I have three uniglide 7spd hubs that are hyperglide comatible. All three have the one wide spline, but also have accommodation for the UG thread on locking cog and/or HG the lock ring. You sure you hub is not like this?
Those aren't Uniglide hubs. Those are first generation hyper glide. When Shimano first came out with hyper glide, they made it compatible with Uniglide cassettes. Later, they eliminated the Uniglide threading.
https://www.sheldonbrown.com/k7.html