I can say with certainty that the screws that attach a plate to the MOS slide is a M3x0.5mm 6mm in length. The ones I use have a tensile breaking strength of 140,000 PSI. These screws I believe are also the same that bigtexoutdoors.com sells as MOS screw replacements. This is the exact screw number you can buy on McMaster-Carr: 94414A712