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 6610-01-499-0776
NSN 5990-01-411-5930
NSN 5950-01-364-0800
NSN 6650-00-035-9297
NSN 6150-01-534-7135
NSN 7035-01-296-4737
NSN 6685-01-228-5332
NSN 6620-00-079-0311
NSN 6145-01-302-9975
NSN 6620-00-858-7317
NSN 5996-01-582-7418
NSN 6110-01-652-2585