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 5930-01-629-5362
NSN 5960-01-425-1454
NSN 6620-01-585-3982
NSN 6105-00-107-3315
NSN 6145-01-607-6165
NSN 6110-01-255-6328
NSN 6620-01-512-5513
NSN 5925-01-645-4909
NSN 6105-01-468-5605
NSN 6645-01-340-0892
NSN 5998-00-128-8128
NSN 5999-01-328-2958