A fitting used with a union nut and thread piece to form a union.
NSN 5996-00-717-0913
NSN 5915-00-225-5696
NSN 5975-01-548-0052
NSN 5960-01-096-4588
NSN 6135-01-517-2900
NSN 5975-01-091-9803
NSN 6220-01-590-7272
NSN 5920-01-471-4423
NSN 5930-00-134-5322
NSN 5990-00-752-2126
NSN 6620-00-106-6851
NSN 5998-01-227-2143