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 6610-00-280-6037
NSN 6110-01-013-9313
NSN 5935-00-905-6986
NSN 5960-01-306-4606
NSN 5855-00-797-8217
NSN 5920-01-462-2517
NSN 7035-01-300-7608
NSN 5920-01-466-3162
NSN 5950-01-538-3161
NSN 5996-01-395-9237
NSN 5998-01-435-6153
NSN 5905-01-206-5830