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 6145-01-603-7952
NSN 6645-01-546-3212
NSN 5950-01-007-6590
NSN 5990-01-146-9126
NSN 6320-00-284-1524
NSN 6645-00-936-9111
NSN 6620-00-426-6884
NSN 5930-01-462-5619
NSN 5999-01-235-7833
NSN 6685-01-397-5659
NSN 5990-01-268-6767
NSN 5930-01-524-7256