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 5935-01-440-3293
NSN 5935-00-209-6774
NSN 6220-01-219-1772
NSN 5935-00-264-3192
NSN 5998-00-237-1937
NSN 5996-00-400-9237
NSN 4140-01-176-6876
NSN 6685-01-576-8045
NSN 6645-01-171-0187
NSN 5990-01-411-5930
NSN 5950-00-722-9058
NSN 5975-01-168-4374