Lower dash screw size

[rommaster2]

I am in the process of adding some gauges in the lower portion of the dash that originally I believe would have held the amp below the radio pocket. I removed the amp or whatever was there before over a decade ago meaning those screws are likely long gone. I am hoping someone knows the screw size for the two screws that bolt the amp in below the radio in the lower dash so I can buy some replacements.

In case it matters my xr4ti is an 86.