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 6220-00-678-9075
NSN 5930-00-702-2060
NSN 5950-01-213-2411
NSN 6240-01-433-5413
NSN 5925-01-614-8094
NSN 6145-01-367-6503
NSN 6620-01-283-5627
NSN 6145-01-471-7901
NSN 5930-01-618-5408
NSN 6610-01-027-1641
NSN 6220-00-245-0876
NSN 6220-00-468-4252