"Oval-head screw with anti-rotation lock", size?

[flintwood]

Hi all.

I'm installing a GPS Retrofit Preparations kit on a 2016 R1200RS (the previous owner had stripped some parts).

So I have the kit, and now need the bolts that hold it to the bike.

"Oval-head screw with anti-rotation lock" Part Number: 46627692608, part 16 in this diagram: 
https://shopmotorrad.bmwtoronto.ca/p/BMW...55507.html

Before I gently try different spare screws in the mounting posts (part 17 in that diagram) - does someone have the dimensions?  Looks like make a 6mm bolt? 1mm pitch?  Length?

Asking here because the dealer is having difficulty sourcing the specific part - but they're just bolts, so I can find them at my local hardware store once I know what to get.

Thanks!