Size: 55mm-iv; bushing diameter: 2.1653 inch
No other part numbers with same form, fit, and function found.
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 6105-01-424-6439
NSN 6135-00-519-1325
NSN 5999-00-061-8168
NSN 4140-01-350-1616
NSN 5996-01-590-5109
NSN 5915-00-233-6346
NSN 6110-00-450-4366
NSN 6610-01-288-6103
NSN 6240-00-331-8732
NSN 6150-00-122-2566
NSN 6320-01-406-6098
NSN 4140-00-300-8111