A fitting used with a union nut and thread piece to form a union.
NSN 5920-01-629-9523
NSN 5895-01-049-1976
NSN 5990-01-533-1347
NSN 5975-01-309-0253
NSN 5895-01-289-9959
NSN 5895-01-323-6413
NSN 5960-01-140-8009
NSN 5835-00-148-9719
NSN 6610-00-134-5625
NSN 5835-00-179-8451
NSN 5950-00-544-7528
NSN 5990-01-551-4356