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 5905-01-395-9075
NSN 5910-01-501-0652
NSN 5915-01-431-0774
NSN 5950-00-231-6204
NSN 6220-01-306-5610
NSN 5910-01-125-8194
NSN 5855-01-110-9564
NSN 5920-01-564-6182
NSN 6620-01-301-8884
NSN 6220-01-158-8073
NSN 6645-01-286-9115
NSN 5996-01-010-0257