Plate screw size?

[Stoneymonster]

So somehow I managed to lose/throw out my plate mounting screws. The ones I bought from an auto parts
store are far too large. Does anyone know offhand what the rear plate mounting screw size is?

 

[Tommy]

I replaced mine with stainless steel security screws size 10x1/2" made by Hillman. Lowes carries them in their parts drawer in the hardware section. You will need the special driver head to attach them. The non-security screws I would think would be the same size.

 

[Stoneymonster]

Perfect, thanks!

 

[FlasherZ]

I've found the heads of the Tesla screws to be too small, and they slip through the holes on Illinois plates unless positioned near-perfectly.