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 6320-01-522-0318
NSN 5996-01-556-3448
NSN 5975-01-316-2504
NSN 6685-01-255-0394
NSN 6685-01-375-4774
NSN 7035-01-567-4744
NSN 6220-00-475-0217
NSN 6145-01-393-1346
NSN 5950-01-264-2083
NSN 4140-01-512-9399
NSN 5920-01-415-2878
NSN 6150-00-244-1964