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 6620-01-186-4374
NSN 2925-01-311-0446
NSN 5910-01-050-0217
NSN 5925-00-313-6049
NSN 5910-01-321-8060
NSN 5985-01-074-8896
NSN 5965-00-504-6753
NSN 5930-01-451-3929
NSN 5975-01-143-5358
NSN 5985-01-494-9234
NSN 5990-00-519-9974
NSN 5910-01-381-5624