It's harder for me to screw them into the holes I've drilled.
Seems to be exactly what I'm looking for, but a 1/4" drill bit doesn't easily screw these parts into place. I'll try to use 5/16" to see if I can get one there more easily, hope it works!
Pros
Type: 35 pcs. 5/16*20 Threaded Insert Nuts with Hex Flange Washer, provides a threaded socket for woodwork, similar to a wall anchor.