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 6610-00-352-7004
NSN 4140-01-316-5725
NSN 2925-00-986-8393
NSN 6110-01-633-9660
NSN 5895-01-568-0851
NSN 6685-01-222-0141
NSN 5855-00-763-2155
NSN 6320-01-296-3181
NSN 6620-01-242-9247
NSN 5915-01-245-8157
NSN 5855-01-406-4821
NSN 6620-00-779-5859