Just helped a family member stitch back together a laptop they took apart. He was missing some screws, but as Zap mentioned you can find other screws in your system that fit. After identifying what screws we needed, we headed to Radio Shack and Frys but surprizingly had little luck. We walked over to the Home Depot in the same plaza and surprize! They had a variety of smaller screws. We didn't find it at Home Depot, but Lowes had it.