No other part numbers with same form, fit, and function found.
A tube coupling nut with the shank end accommodating a smaller tube size than is accommodated by the tube fitting which connects to the threaded end.
NSN 6130-01-437-5576
NSN 5985-00-228-9119
NSN 6650-01-504-4745
NSN 6135-00-583-3966
NSN 6240-01-519-8781
NSN 5950-00-225-8849
NSN 6150-00-526-3720
NSN 6220-01-634-0660
NSN 6220-00-420-1245
NSN 6110-01-502-9212
NSN 5960-00-376-5514
NSN 5975-01-512-8525