Thanks for looking into this for me. I found this post earlier and ordered the M3 screws based on this thread...not your fault, I should have waited til I got the unit then match the threads at the hardware store and order after I was sure. I just wanted the screws faster so I could make the build when I got the radiator. I went on a hunch after seeing the screws that come packed with the unit and ordered some #6-32 x 2-3/8" screws from Amazon...should be here today, along with my final build components, so I'm in no bind, just short $20 for the M3s I ordered from Fastenal (couldn't find the length I needed anywhere lol).
So, I have (12) black M3 x 60mm hex head screws and (24) 0.5mm M3-size washers if anyone is looking! This is useful for 25mm fan + 25mm shroud + gaskets and case material.
Thanks again ThermalMike!
If I may add a suggestion...let's create a thread that lists all thread sizes and depth into the radiator (before hitting the fins) for all radiators for easy web searching. This is the only post I could find that says anything about radiator thread sizes.