Who Knows Correct Screw Size for Tail Light & Reverse Plastic Lenses?

Those screws are unique: dull wood screw like with a shoulder? of course mine are not in there....I have replacement lenses in bags still.
Yeah, the threads aren’t as sharp as the wood screw. I think you could get some #9 wood screws and spin them in some sand paper lightly to take the edge off. Then just shorten them to the right length. Or maybe the OP will get lucky at the bolt store.