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 5990-01-322-9781
NSN 4140-00-443-1210
NSN 6220-00-194-3827
NSN 5835-01-200-7153
NSN 5910-00-803-9881
NSN 5855-01-351-6875
NSN 6130-00-212-4883
NSN 5895-01-500-2304
NSN 6650-00-583-1735
NSN 6650-01-618-5317
NSN 5998-00-035-5308
NSN 6610-00-960-1561