A fitting used with a union nut and thread piece to form a union.
NSN 4140-00-985-0182
NSN 5920-01-543-5134
NSN 5920-01-481-8755
NSN 5925-00-581-3889
NSN 4140-01-435-6198
NSN 6130-00-617-1529
NSN 6130-00-409-9073
NSN 5960-00-270-8171
NSN 6135-00-180-5125
NSN 6645-00-074-4580
NSN 5855-01-629-4002
NSN 6645-01-346-4505