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 6610-01-026-1701
NSN 5895-00-723-7258
NSN 5985-00-448-3001
NSN 5855-00-231-7790
NSN 5935-01-383-7119
NSN 5965-01-306-4484
NSN 6150-01-619-0470
NSN 5950-00-918-2972
NSN 5950-00-277-4439
NSN 6135-01-452-1956
NSN 5855-01-631-5051
NSN 6240-01-521-2635