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 4140-00-376-5712
NSN 5950-00-646-9842
NSN 6645-01-465-4915
NSN 5996-01-463-0522
NSN 5975-00-964-9064
NSN 6320-01-325-8322
NSN 2925-01-180-7793
NSN 6650-01-161-9876
NSN 5930-01-482-5104
NSN 5950-00-252-4953
NSN 6150-01-191-0136
NSN 5990-01-641-2217