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 5965-00-125-6984
NSN 5990-00-316-8872
NSN 6610-01-197-8302
NSN 5930-01-323-5875
NSN 5960-00-372-4876
NSN 5985-01-145-5337
NSN 5990-01-170-0077
NSN 5990-00-782-7206
NSN 5905-01-634-0595
NSN 5855-01-628-6427
NSN 6145-01-281-7222
NSN 5915-01-133-7658