Here's a article on a subject that you don't see everyday in the PC world: a guide to case screws. They're pretty much over looked these days, but the HardwareSecrets guys think they deserve some time in the sun. They cover all types you're likely to find accompanying that new case.

"When you buy a case for assembling a new PC it comes with several screws and other small components. Even seasoned technicians have trouble in telling what is the exact use of each screw that comes with the PC case."