I use EZ-Lock stainless steel inserts in 18th and 19th Century window jambs to make the stops easy to put in place, and take out for future work on sash. They're made for metal, and fit in a tapped hole. I darken the slotted heads on brass machine screws, and so far, not a single person has ever noticed them.
These old window jambs are Southern Longleaf Heart Pine around here, and very difficult to drill an accurately placed, and square to the surface hole, so I made a guide for the drill bit that uses metal guides. That shouldn't be necessary for your use, but I wanted the spacing to be the same on all the windows of the same size, so didn't have another good choice.
A shopmade wooden guide should do enough holes for what you want to do. You will need a bottoming tap for stopped threaded holes for the inserts though. A metal cutting tap might not cut perfectly clean holes in wood, but they're good enough. I've had difficulty driving the brass ones made for wood too, and decided they just weren't worth the trouble.
https://www.ezlok.com/e-z-lok-solid-...tainless-steel