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 6685-01-089-9606
NSN 5925-01-371-3378
NSN 6130-01-339-5504
NSN 6105-00-099-8818
NSN 5990-01-255-7387
NSN 5990-01-079-8643
NSN 6650-01-039-9340
NSN 6685-01-382-2996
NSN 2925-01-633-4048
NSN 6105-01-461-9317
NSN 5895-01-570-4799
NSN 6150-00-518-1402