Create a technical drawing of a vacuum component namely kf16 to 1/4" male npt adapter using a 3D model such as sketchup, inventor etc. Present a top, bottom and side view of the component in the appropriate scale in a single page.
Use this as an example:
https://www.datafilehost.com/d/0b580c4f
Use this as a reference:
https://www.idealvac.com/files/literature/Sec_01_Ideal_Vacuum_Fittings.pdf
Save the file in https://www.datafilehost.com and leave the file editable.