u/Guy-Montag-451F

I have a Linear OpenHouse H318 structured media center with the HC18A cover.

I lost 3 of the 4 screws for the cover a looong time ago. I brought the remaining screw to the hardware store today to find a match, and was unable to find one. It appears to be close in diameter to M5 or #10 machine screws, but M5, 10-24, and 10-30 don’t match the thread pitch.

Does anyone know what screw size this thing takes?