Thread: Holosun mount screws.........

I think Reloaders sell kits of various sized screws for mounts, I had to find some 3.5 mm hex head screws on thurs, 46 tpi from memory, got them from eng supplier overnight, have 8 spare but round head posi drive in zinc. Try a 3 mm and 4 mm if inbetween you maybe be in luck

Pretty sure they're metric. Just go into any decent engineering/fastener supplies shop, they should be able to match up what you need.
Just went and checked mine. They are metric M3x0.5 Torx pan head screws 4mm long.