Sometimes called an expansion slot cover, a blank slot cover is a thin piece of metal covering an opening in the back of a computer case for an expansion card. The cover protects the inside of the case from foreign objects, maintains proper air flow, and eliminates electrical interference. When installing a new expansion card, the blank slot cover must be removed first. The picture is an example of a blank slot cover, next to two expansion cards.

Chassis, Hardware terms

With screwless cases, you may not have a screw to secure each blank slot cover in place. Instead, the blank slot covers are held in place with one thumb screw attached to a metal holder that can be removed after the thumb screw is removed.

  • How to install computer hardware.
  • How to open a computer case.
  • Computer case (chassis) help and support.
  • Computer hardware help and support.