What screws do I need to attach fans to my O11 Dynamic case?

[Goose]

I recently tore down my water cooled system to go back to air and I need to attach the fans to my case that were previously attached to my radiators. The problem is I can't find any screws that actually secure the fans to the top and side panels due to the width of the mounting slots (picture attached).

Does anyone know where I might be able to buy some suitable screws?

Thanks

imgur.com

Discover the magic of the internet at Imgur, a community powered entertainment destination. Lift your spirits with funny jokes, trending memes, entertaining gifs, inspiring stories, viral videos, and so much more from users.

imgur.com

 

[Goose]

Surely they are just the standard fan screws that self tap into plastic fans? (there's no specific fan screw mentioned in the 011D Manual)

It's the head size that's the problem, i have a couple of screws similar to the ones in your picture but they literally fall through the slots in the case.

 

[Goose]

@Armageus

Thanks for the suggestions, unfortunately the rubber fan mounts dont work either (I have the noctua ones and some no-brand ones). I think i'll have to find somewhere that sells those types of screws with some metal washers.