might just be easier to buy these instead of using screws.
https://www.overclockers.co.uk/showproduct.php?prodid=FG-053-AK
Hey, rubber washers will not eliminate vibrations - they just will not "move" vibrations further, to the casing ... partially, of course (depends on personal ear, lol). If fan vibrations are so strong - maybe it's high time to replace fans to some branded ones ?![]()