These custom modified button socket screws were made using standard off the shelf M3 X 0.5MM button socket cap screws.  The COTS version was modified to an overall length of 7.24MM, inclusive of the head height. The dog point prior to the radius start was set at a length of .015″ and diameter of .090″.  At the end of that dog point section the radius was machined at R 0.075.  Lead time for a similar modified part is typically 3-4 weeks from the attainment of the COTS version.