Fitvell 316 Stainless Steel Mini Ball Valve 1/4" NPT Female x Male Thread Shut Off Valve for Water,Oil and Gas 2pcs

I wanted to love these, they seem well constructed and fit perfectly into the small space I need them. However, the tolerance on the female threaded side is far too loose to be usable. It's so loose I can push it past the threads on my bulkhead. No amount of plumber tape can fix this. These were probably manufactured en masse in a Chinese plant with no quality assurance. Go elsewhere.