A fitting with pipe threads having a female connection inside of a male connection, used in conjunction with another fitting, to connect in the same line, two pipes of different sizes.
NSN 5996-01-556-2487
NSN 5990-01-347-6080
NSN 6240-01-417-8792
NSN 6650-01-131-2570
NSN 7035-00-408-8170
NSN 6110-01-280-3871
NSN 6645-00-350-8070
NSN 5835-00-239-9619
NSN 5945-00-174-0810
NSN 5835-00-138-7807
NSN 5998-00-138-5265
NSN 5920-00-245-6434