A fitting used with a union nut and a tailpiece to form a union.
NSN 4140-00-410-2581
NSN 6135-01-119-0720
NSN 5905-01-297-7327
NSN 5855-01-188-4049
NSN 5985-01-444-1413
NSN 5915-01-607-4773
NSN 7035-01-176-2208
NSN 5998-01-328-7504
NSN 2925-01-175-1217
NSN 5945-01-297-9666
NSN 6645-01-007-5295
NSN 5905-00-018-5404