Jeff Handy
Pro Handyman, NOT A Pro Plumber
Sounds like it’s time to risk splitting it with your Dremel, just don’t go too deep into the male threads.
Make a decent slice, then try to pry open the slit with a very large flat screwdriver, with a twisting motion.
Make a decent slice, then try to pry open the slit with a very large flat screwdriver, with a twisting motion.