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Reassemble with correct screws? Poll is created on Oct 26, 2025

  
  

[Solved] I messed up my screws...  

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Christina Lang
(@christina-lang)
Member
I messed up my screws...

Hello,
soooo I messed up.

I built my Core One about a week ago - did several benchys and already some prints I am using and everything works fine. I wanted to sort away all my spare parts and manuals and found a completly unopend package of screws (M3x4r). 

So it seems I used the M3x4rT instead of the M3x4r in the Chapter 4 steps 7 to 9.

My question now... how bad is this? It seems to work perfectly fine so far, but I don't know if this could lead to long term damage or it already did damage and I just didn't notice it?

Napsal : 26/10/2025 12:45 pm
CJD
 CJD
(@cjd)
Trusted Member
RE: I messed up my screws...

The only difference is they're torx vs hex, no? Should be no damage, same thread pitch and length. head size the same so no risk of a collision or anything like that. I'm honestly not sure why there are both variants, but as long as you had enough of the T versions where they are specced I suspect you're fine.

Napsal : 26/10/2025 4:04 pm
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hyiger
(@hyiger)
Honorable Member
RE: I messed up my screws...

No, you won't damage it since the M3x4r screws are just for securing the heat bed brackets. Pretty sure you can just leave it as-is and not worry. The other set (M3x4rT) are for securing the power supply and buddy board box. Why Prusa chose to use different screw types for this is beyond me.

I had reused screws from taking apart my MK4S to do the upgrade so I ended up with extra bags (which confused me at first). 

"Some filaments feel the rain, others just get wet"

- Bob Marley

Napsal : 26/10/2025 4:09 pm
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Christina Lang
(@christina-lang)
Member
Topic starter answered:
RE: I messed up my screws...

@cjd @hyiger - thanks for the quick answers - you two confirmed what I hopped.
Just wanted to get some outside opinion to make sure I didn't miss any difference.

Napsal : 26/10/2025 5:02 pm
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