wooden window sill

Any suggestions or helpful info on sizing/making the receiving holes in the wooden door frame? The screen I'm making is for the top half of a split door that was not originally built to host a screen. I'm imagining using the spring loaded plunger pins on all sides of the aluminum screen frame to fix the screen in place into the door frame. Of course, I will have to remove the screen to travel through the door or to close the top half of the door, but it's a low traffic door. I'm wondering if there's a trick to creating the small receiving holes in the door frame into which the pins spring into. Simple small hole or are there some sort of metal grommet that is recommended, etc. If you need a pic, let me know and I can take one. Thank you.

OK thank you.

Is that screen pin thinner or thicker than the normal screen pin? I'm going to use 7/16" screen frame, to give the screen some rigidity.

Since the wooden door frame (into which the screen will go) is exterior and somewhat exposed to rain, is there some sort of plastic/metal grommet or receptacle that can go into the drilled hole in the door frame? I'd prefer to finish the hole since 90% of the time the screen will not be in place.