Huh? I've always used a 3mm drill for a hole for M3 bolts, 4mm drill for a hole for M4 etc.
If you want a bolt to stick in a hole, you'd need to make it threaded using a tap. These holes need to be drilled even smaller (and there are charts for that), and the material would also need to be sufficiently thick or the thread will risk ripping.
I'd suggest that you instead use either threaded spacers with bolts from the top and bottom, or "barrel T nuts" if you can find them in a size that would work. There are also "Chicago screws" but they are really for leather-making so they are often not always made with as high tolerances as machine bolts.
Ergonomic, split and other weird keyboards
Posts must be of/about keyboards that have a clear delineation between the left and right halves of the keyboard, column stagger, or both. This includes one-handed (one half doesn't exist, what clearer delineation is that!?)
i.e. no regular non-split¹ row-stagger and no non-split¹ ortholinear²
¹ split meaning a separation of the halves, whether fixed in place or entirely separate, both are fine.
² ortholinear meaning keys layed out in a grid
No excessive posting/"shilling" for commercial purposes. Vendors are permitted to promote their products/services but keep it to a minimum and use the [vendor] flair. Posts that appear to be marketing without being transparent about it will be removed.
This subreddit is not a marketplace, please post on r/mechmarket or other relevant marketplace.
