Originally Posted by CaptainCool

I had this happen on a Soma hub with a Milwaukee cog and lockring. I could only get 1.5-2 rotations on the lockring. I replaced it with a Surly lockring -- the Surly has a lip that reaches inside the cog to grab more hub threads. With that lockring I think I got about 4 rotations.

I think I see two threads hanging off of the hub in your picture. That's probably fine. I'd want more than half, maybe two-thirds, of the ~6 threads on a lockring engaged with the hub.

Either way works, though you could try flipping it to see if more threads engage. You need the narrower side in to clear the chain when using a 12t cog.