I got a better look at the assembly, this url, http://www.bit-tech.net/hardware/coo...-h80i-review/3 (same as the one above). There is a click to enlarge the photo (did not do it earlier). The radiator looks about one inch or one inch plus 'thick'. I do think those 'screw threads go the entire thickness of the radiator; but you can prove this easily by removing it and looking on the opposite side; maybe there is no hole there at all (the hole being a continuation of the front hole that now has the stripped threads.
In order to be clear, what I am looking at is the picture from the above 'bit-tech url', the picture enlarged by a 'click on' per the comment under the picture. I am looking at a chrome plated shiny screw (with a flat washer) going thru the lower left fan corner 'flange' (as one faces the fan from inside the case). The screw has no threads for about the first 3/4's of the screw length. The screw goes into a threaded hole in the radiator -- my suggestion as follows in the next para.
Remove the radiator / fan assembly. You need to look on the opposite side of the hole for the screw just described. In the enlarged picture of the fan/radiator, the side of the radiator appears to be 'stamped sheet metal' with an edge folded over that goes under the fan surface -- however, one cannot see in the picture 'what is really behind the fan regards the threaded hole -- so you need to take out the fan / radiator assembly and see the backside of the radiator to figure out what to do about the 'stripped threads'.
This comment I am not sure of but I will say it anyway. The side of the radiator does look like 'a stamped piece of sheet metal'. In a high production 'die stamping process' the metal surrounding the hole for the screw 'can be
stretched a small amount in order to allow more 'thickness to the hole for threading purposes' -- this could explain the 'easy' stripping of threads in holes you refer too.
I suggest you try to figure out exactly what you are dealing with in the way of a 'stripped hole'. You are looking for a hole on the back side of the radiator identical to the front side but in line with the hole on the side the screw in the picture goes thru. I just want to know if there is a hole on the back side (hidden side) of the radiator -- if there is one there, I suggest you do not try to use it, just do another post and I can suggest the next step. (For your info: If there is a hole on the radiator back side that is in line with the screw thru the fan, it may or may not be usable -- I will have to explain so post back whether or not the hole is there and, if it is threaded or not.)
I apologize for the long post; I just want to be clear and be in agreement if you are going to follow these suggestions.