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-   -   What size fan screws for 38mm fans on rads? (https://www.hardwarecanucks.com/forum/water-cooling/8583-what-size-fan-screws-38mm-fans-rads.html)

Bojamijams July 14, 2008 08:01 PM

What size fan screws for 38mm fans on rads?
I'm putting the 38mm ultra kazes on a BIX 480 rad, but I don't know which size screws to get. The 1-1/4 fan screws on NCIX.COM are for 25mm fans on a rad. So what would be the good length

Using google conversion the 13mm increase is 0.51 inches so I guess I need 1-3/4 length screws? But are BIX480 6/32" Or M4? Anyone know?

miggs78 July 14, 2008 08:37 PM


M4 Threaded Screw Holes for easier mounting and greater adaptability.
Now that is according to the HW Labs website, description for the GTX480.

My guess would be 1 1/2" screws may work.

Bojamijams July 14, 2008 08:46 PM

38mm is 1.5 inches so I don't think so.

25mm is 0.98 inches so it looks like 1-1/4 screws that are meant for it are only supposed to go in 1/4in.

Hmm yeah.. definetly looks like I need to find 1-3/4 M4 screws.. except they're M4 and not imperial so.. eek.. 44mm M4?? damn thing stuff gets complicated

KaptCrunch July 16, 2008 07:37 PM

also check that when screwing in that end of screw not hitting a tube, between tubes is ok

can get a 6-32 tap from home depot and re tap holes^^^^^ same as above

CanadaRox July 17, 2008 11:43 AM

When I used Scythe Kaze fan's on my MCR320, I used 2 inch 6-32 with 3 nylon spacers + a fan grill and the screws were barely not touching the internals of the rad. If you bring one of the screws you have to Home Depot and they should have something that lets you check the type of threading. If you can get 1-3/4 screws, they would be perfect, but if not a 2 inch screw and some spacers will do the trick as long as you have a few extra mm in front of the fans to spare.

DK2 July 17, 2008 12:25 PM

you guys are too extreme.... :biggrin:

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