Aignep swivel male elbow, 60110-04-04, 1/4" tube x 1/4" swift-fit, stainless steel simplify the world of push-to-connect fittings with the alpha swift-fit.
Npt, iso 228, bspp, iso 7 bspt, g thread.tapered, straight, inch, metric who knows? In any case, down-time is increased; production time is lost all over a simple fitting. If you have a pipe thread, you can count on swift-fit to seal without leaking. Port size can easily be identified but what about that thread pitch? Save time, save money by using alpha swift-fit.