If you have an unsheilded M.2, and don't want to mess with fiddly screws each time you want to install or remove your drives, print this quick and easy model, install it with the existing M.2 screw, and you'll never have to touch that screw again! Comes in both 2.5mm height for short standoffs, and 5.5mm for longer ones (check my profile). Ideally print it on its side, it sits at an angle for maximum strength.

WARNING: PLA may melt if your PC gets hot, PETG is ideal for this print, although ASA or ABS would be a completely safe bet, even in more restricted PC cases