I have seen too many slip joint pliers slip and cut through protective leather.

You have to degrease the threads on both parts. Threads must have no lube at all.

If you don't have the proper tool, use a good clean drill chuck. Tighten it on the shaft, not the knurled part. Then (with the empty cases in the chambers) Tighten by hand Line Officer tight as mentioned, (referred to as flight line tight by tarmac turdies). If it comes loose again, just repeat and give it a little more spirit when you twist it.

Take it easy, these are small parts.

And I am in the NO Locktite on gunz camp. (scope rings aren't gunz).