I've started wearing out the heads of some of the screws used to secure the top cover. What kind of screws are used there? I tried taking one to a shop specializing in screws, but they didn't have anything like it. The screws are about 6mm long including the head, 3mm across (diameter) and 5mm across the head (diameter) with a 0.8mm pitch.
Thank you for contacting us,
First of all, I need to mention that this product is already discontinued, meaning it is out of support and information might not be up-to-date, however, here is some information I found online.
The server https://www.intel.com/content/dam/support/us/en/documents/motherboards/server/r2000gz-gl/sb/R2000GZ_GL_QIG.pdf Intel® Server System R2000GZ/GL Product Family Quick Installation User's Guide, scrolling down to page two you can find a quick guide on how to remove the top cover, something like this:
If you are seeing something different. Please share some pictures with us to have a better idea of what you are dealing with.
These are Phillips 6mm flat head machine screws, they're commonly found in hardware stores, if by any chance you can't find them locally here are some examples of online providers, even if they don't have them they could make them for you, here the links:
Let me know if this help you out or if you need anything else.