Actually the hose size does not change, just the pipe fitting end does.
McMaster Carr part numbers....
50695K161 -Steel 37 Degree Flared Tube Fitting Adapter for 1/4" Tube OD X 1/8" NPTF Male Pipe
50695K162 -Steel 37 Degree Flared Tube Fitting Adapter for 1/4" Tube OD X 1/4" NPTF Male Pipe
And no the F in NPTF is not for female, it is for fuel or dryseal.