I need to be sure that these are right values for MOSFET 2N7000
The Fairchild datasheet for the 2N7000 shows different transfer characteristics which are closer to your results. It is important to realize that the graphs given in datasheets are typical values only. Your own part may vary widely from these.



If you look at the specs for the On-State Drain current you can see that at Vgs 4.5V it can be as low as 75mA, typically 600mA, and the maximum is not specified.