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 5920-01-483-0533
NSN 5935-01-306-6682
NSN 5855-01-431-8937
NSN 6130-01-341-2801
NSN 6685-01-250-2669
NSN 6105-00-351-3059
NSN 5975-00-926-7563
NSN 5990-00-167-2692
NSN 5960-01-175-9880
NSN 6645-01-383-6514
NSN 5930-01-397-2452
NSN 6135-00-175-7132