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 6620-00-610-1272
NSN 2925-00-265-7539
NSN 6110-01-116-4251
NSN 6135-00-377-9165
NSN 5920-00-070-8712
NSN 5998-01-521-5385
NSN 5915-01-186-2401
NSN 5855-00-245-8461
NSN 5910-00-368-4108
NSN 5905-01-095-4603
NSN 5999-01-237-1910
NSN 7035-00-861-7913