hehe. if u must know, not all screws are made the same, but the one Sony has looks very standard. off hand, #8, screw for metal, self tapping, 1.5 inches long, tempered for heat. info : there are special screws that the military and aerospaces industry uses that are REALLY expensive to produce...like up to 1k USD. These screws are design to withstand fatique, g-forces, heat, temperature changes, light weighted, etc, etc. It is like, would you fly in a plane that don;t have these characteristics?
sony are always pushing new expensive non-standard only sony can make crap Mini Disk Memory cards UMD disk and now Sony Screws
Hah~! Don't even mention mini disks!! I thought they'd catch on later, but I see I've wasted cold hard cash on yet another ignored gadget!