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 6145-00-451-6651
NSN 6620-00-325-4693
NSN 5945-00-341-8018
NSN 6645-00-815-5448
NSN 5945-01-323-7171
NSN 2925-01-544-4880
NSN 6135-01-492-5717
NSN 5855-01-136-1916
NSN 5915-00-880-2193
NSN 5985-00-442-6876
NSN 6110-01-642-6305
NSN 6220-00-777-7156