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 5945-00-054-6806
NSN 6610-01-067-6591
NSN 4140-01-544-7602
NSN 5905-01-316-6681
NSN 6650-01-294-5243
NSN 6610-01-224-7247
NSN 5895-01-120-1359
NSN 5965-01-230-2350
NSN 5950-01-539-9576
NSN 4140-01-453-5596
NSN 6135-00-240-3200
NSN 5920-01-256-0287