I'm searching for screws for hot swap SATA hard drive trays. Trays from vendors as varied as SuperMicro, Icy Dock, Synology, and the Infrant (NetGear) ReadyNAS all seem to use similar screws, but none of them seem to sell spare screws.
I need a 6-32 flathead countersunk phillips that's 0.20-0.30" long, and has an 0.19-0.20" (5mm) diameter
The problem is that it's a non-standard screw, in that the countersunk head is much flatter and smaller.
In the image below, in each pair, on the left is a standard 6-32 flathead. On the right is the screw that I need. As you can see the thread is the same, but the counter-sun part is flatter and has a much smaller diameter.