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 6130-01-251-0320
NSN 5920-01-051-8086
NSN 5945-00-826-8834
NSN 5925-00-788-0368
NSN 5920-01-205-3442
NSN 6145-01-315-6397
NSN 5935-01-007-2791
NSN 5930-01-464-4233
NSN 6645-01-237-2568
NSN 6220-01-341-0630
NSN 5915-00-279-2973
NSN 6145-01-359-1657