It had nothing to do with not reading the OP properly, though it does have to do with not reading my reply properly. What I meant was:
If the lockring doesn’t thread on and/or tighten securly, the threads are probably damaged (assuming hub threads are fine).
And yes, I realise it’s likely the hub that’s stripped, but he’s specifically asking how to check the lockring.
If you were innocent of not reading a thread before replying, I’d be less perturbed by your jab.
Sounds like great adivce, albeit repeated: