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 6135-01-177-3552
NSN 6220-00-851-9037
NSN 6105-00-061-5038
NSN 5925-00-973-1160
NSN 5895-01-220-2939
NSN 6130-01-144-5978
NSN 6135-01-452-2421
NSN 7035-00-009-8705
NSN 7035-00-252-7467
NSN 5905-01-186-4948
NSN 4140-01-605-1414
NSN 6105-00-890-4982