If there’s any small gap left when it’s screwed together it could be a nitroglycerin tablet holder
maybe perhaps it's a pair of caps for sensitive equipment, like some coaxial cable termination. these things can get expensive
Could be a rosin pre-press mold.
I don't know what it is for sure but I bet it'd work great as a pill crusher.
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
