PCIe Blade SSD mounting screw size?
My Late 2015 iMac has a 500GB Sata SSD. I want to add a 1TB PCIe SSD blade and replace the Sata SSD with a large capacity HDD. What is the size of the PCIe SSD mounting/retaining scew? It seem most Windows Laptop and Desktop systems use a 3mm screw for M.2 SSDs, but I know Apple likes to be different just to make things difficult. Since my system does not have a factory SSD blade, I assume there is no mounting screw inside and I want to make sure I have all the correct parts before going through the effort to open it up.