Sun Visors

I received some sun visors from Finishline and went to install them this morning. Just one little problem; the supplied screws to attach the mounts to the windshield frame are 6-32. The taped holes in the frame are smaller. I tried 4-40 but they didn't thread in. I suspect they are metric. Anyone know what the windshield is taped for?

I don't know if Finishline or the maker of the windshield changed gears..... a Finishline SV kit mated up fine to my older car a few years ago when I installed them???????