Help!, cooler master 120mm blue led

[XPurEsDR]

hey, i recently got 3 cooler master 120mm blue led fans for my new case. the annoying thing is the fans have no threads. I CANT SCREW THE FAN INTO THE CASE, the screws just wont go through!!, its been soo frustrating.
please help me with this, gladly take all suggestions. hope you all had a good christmas.

 

[jameseboy]

you can either use cable ties or threading screws. best bet is the threading screws, they more or less gouge the thread into the plastic, like self-threading screws for wood.

look like these

 

[RaceFace]

I had the same problem, and didn't want to mess up the fans as I usually switch the fans placing regularly.
I went to the local hardware store, and bought screws like these black ones, including the nuts.

They go straight through the fans screw holes, easily installed and uninstalled.