Replacement screw - solar steplight or solar floodlight

I just installed a solar steplight and managed to strip the screw on installation…I got it out and replaced it with a [same size] screw from my solar floodlight that I still need to install, but I need to replace it.

Anyone know what size screws these are? I’m thinking I rather just pick something up at my hardware store as the ones Ring sent were very soft / stripped easily. I don’t want to go through this trouble with the spotlight while I’m 12 feet up on a ladder!

Thanks in advance!