Connect copper or brass tube to a male UST model pipe thread. Tube unions include both nut and cone. Cone must be soldered to tube.
Click here for information on model pipe threads.
Very handy union.I would buy more if there were tube unions threaded 1/8" NPT-27 TPI for 1/4" and 5/16" O.D tubing. Over all, good fitting.
Great fittings. Same here...also looking for 5/16” tube x 1/8-27