Replacement mounting screw for Varia UT-800 headlight?

Question

Does anybody know the screw size for the mounting screw for the UT-800 headlight? Mine fell out today while I was riding and I could not find it.

LK2500 · Answer

If anybody else is looking, it looks like M5 .80 x20 works. I bought these https://www.lowes.com/pd/Hillman-5mm-0-8-x-20mm-Allen-Drive-Cap-Screws-2-Count/50088870