type of screw hard drive bracket

hi everybody

need help: changing my hard drive i have damaged the "philipps" screw. there is no possibility to buy these screw alone. only with the complete harddrive bracket set it is available. can anyone help me?

what kind of screw is it? where can i order it?

maybe it is a screw which is usefull for modelbuilding?

thanks a lot

here are the link for the pics:

MacBook Unibody (A1278) Hard Drive Bracket

it is the screw in the middle