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 5930-01-131-5540
NSN 6610-01-360-3564
NSN 5996-01-467-2177
NSN 5855-01-369-5037
NSN 6610-01-542-9725
NSN 5855-01-400-1590
NSN 5990-01-236-8399
NSN 5930-01-415-2495
NSN 6610-01-033-2402
NSN 6105-01-231-1654
NSN 5855-01-100-3272
NSN 4140-01-058-6603