A fitting used with a union nut and thread piece to form a union.
NSN 6645-00-405-1077
NSN 5998-01-246-1797
NSN 5996-01-607-5845
NSN 5999-01-322-2588
NSN 6145-01-526-6884
NSN 6645-01-430-2420
NSN 5975-01-145-7822
NSN 5945-01-029-9311
NSN 6130-01-154-4147
NSN 7035-00-238-3662
NSN 5895-00-585-0039
NSN 6105-01-532-0395