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 5985-01-281-7700
NSN 5920-01-306-5624
NSN 6220-00-298-9302
NSN 6645-01-212-9474
NSN 5930-01-254-6126
NSN 6150-01-340-0126
NSN 5935-00-971-0288
NSN 5905-01-444-3891
NSN 2925-01-062-2660
NSN 6145-00-583-9989
NSN 6145-01-624-8130
NSN 6130-00-087-2577