Mega STE case screws

[Jens]

Hi,

I have gotten my old Mega STE out of storage and noticed that I had not properly assembled it the last time I did touch it (some 20-30 odd years ago). Given the amount passed I did of course every single last case screw (except for the bdd cover one which by coincidence seems to be the only one that isn’t just screwed into plastic stands).
I searched around and there are suggestions that M30 20mm self tapping screws are the right size. I could not find any official documentation regarding the size (I went through the service manual but the 91 version I found is lacking some diagrams which I think cover the case).
So my question would be is M30 20mm the right size, is there some official documentation?

Thank you
Jens

[darkxavier]

They are M3x10mm self tapping screws

[frank.lukas]

The original Atari case screws have a special thread pitch for the plastic bolts. I bought regular 3x10 wood/plastic screws, and while they work, they are difficult to screw in.

[Jens]

I found the answer in the Atari tt service manual. There is a drawing in there detailing all the parts. Assuming that the tt and ste case are identical the screws are M3-12. It does make a lot of sense to me though that a variant that is meant to be used in plastic was actually used.

[frank.lukas]

1 - Atari original screw
2 - sheet metal screw
3 - sheet metal screw

gehaeuseschrauben.jpg

[Jens]

I will order some Würth screws. I will post details one I receive them. If I get adventurous I might try torx screws too.