A fitting used with a union nut and thread piece to form a union.
NSN 5915-00-174-7079
NSN 5975-00-351-8434
NSN 5985-01-177-2370
NSN 6620-00-104-6937
NSN 5975-01-451-7448
NSN 7035-01-512-7776
NSN 6135-01-084-1609
NSN 5996-00-794-2546
NSN 6645-00-363-9775
NSN 5950-01-422-1361
NSN 5910-00-383-1993
NSN 4140-01-656-1999