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 6150-01-214-1742
NSN 6130-01-170-5085
NSN 2925-00-172-9264
NSN 4140-01-444-9815
NSN 5965-00-042-5433
NSN 5855-00-427-7848
NSN 5905-01-515-8444
NSN 5990-00-125-5036
NSN 6130-00-307-9718
NSN 5910-01-184-7526
NSN 5998-01-437-1311
NSN 6220-01-643-2123