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 4140-00-757-5270
NSN 6240-00-469-7986
NSN 5905-00-266-8401
NSN 5985-01-659-4133
NSN 6150-01-530-0282
NSN 5855-01-321-3881
NSN 6240-01-368-0762
NSN 5895-00-855-3161
NSN 6620-01-383-6494
NSN 5998-00-444-9306
NSN 5935-01-197-7366
NSN 5975-01-256-7216