I don't want a screw that will puncture my radiator (obviously) but I want it to be long enough to go through my 38mm fan, case, and have enough at the end to hold onto my radiator. FrozenCPU recommends a 30mm screw for a 25mm fan, but with 38mm fans, they offer both 40 and 45mm screws. I use a GTX 360 Radiator which uses M4 screws. My question is: for a 38mm fan, 40 or 45mm screws? 40 seems almost a bit short and 45 seems excessive! For 25mm fans, I think 5mm extra sounds good, but with 38mm fans, choosing between 2mm and 7mm extra seems like a dangerous choice. HELP!
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