H105 screw size delema

[Excalabur50]

Hey guys and gals anyone know what size the screws of a H105 are?
I have m3's which are too small and went and bought some m4's which are too thick so any help would be great
ps its for adding fans for push-pull

 

[YouWhat]

The fan screws are 6/32 approx 30mm long, although I have found that the ones approx 27/28mm long are better as they don't go into the rad fins.

 

[Excalabur50]

Thanks mate will check ebay and see if the have em
update took the unit to bunnings and it turned out to take 1/8th screws so got me some all happy now