A fitting used with a union nut and thread piece to form a union.
NSN 6645-01-631-6074
NSN 5905-00-189-3083
NSN 5915-01-335-0187
NSN 5925-01-334-2930
NSN 6650-00-269-4599
NSN 5945-01-254-8411
NSN 4140-01-012-3996
NSN 6130-01-386-6715
NSN 5910-01-462-1205
NSN 6135-01-362-4256
NSN 5905-00-959-0734
NSN 5895-00-446-2493