R2308GZ4GC/S2600GZ top cover screws

Hello nomorries,

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 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.

Best regards,

Ken.

Hi, 
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:

http://www.armourscrew.com/index.html
https://www.boltdepot.com/Product-Details.aspx?product=5147
https://www.grainger.com/category/machine-screws/screws/fasteners/ecatalog/N-8n0Z1z0ncw6

Let me know if this help you out or if you need anything else.

Ken