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 6620-00-193-9503
NSN 5925-01-517-8612
NSN 5975-00-916-2536
NSN 5950-01-020-9160
NSN 5990-01-600-5989
NSN 4140-01-350-3277
NSN 5996-01-445-7284
NSN 5996-00-071-0042
NSN 7035-01-115-8996
NSN 5935-01-581-5988
NSN 6645-00-510-6643
NSN 5910-00-865-2547