A fitting used with a union nut and thread piece to form a union.
NSN 5835-00-518-4507
NSN 6610-01-422-1322
NSN 5905-01-357-1110
NSN 5905-01-445-5923
NSN 6110-00-598-2574
NSN 5985-00-144-8170
NSN 2925-01-448-2880
NSN 5965-00-233-3851
NSN 6620-01-239-3804
NSN 6645-00-411-3733
NSN 6150-00-886-4320
NSN 6645-01-642-3637