I also have this issue as I own the radiator but can't mount the fans as there are no screws. Customer support does not seem to know what the screws are. I'm finding it very difficult to get an actual screw spec off them. We are 8 emails in and this is the best I have. "We suggest trying to see if Bunnings has fittable screws as the price for just the shipping fees would be insensible. The length of the M3 screws used for the fans is approximately 35mm. Best Regards, Thermaltake ANZ - Support"