Bambu A1 random screw fell out mid print

As the title suggests, I was mid print and as I glanced over to check the print progress, I could see it had gone haywire and the print was all messed up. Upon further inspection, I found this random screw fell out from somewhere and hit the floor, initially I thought it hit the print bed but now I can’t quite recall if it did. I have only had this printer 2 days so it’s a little unexpected. Of course I then checked all obvious locations along the printer frame and opened up the toolhead, but this screw is not like any of the others. See the picture attached. It’s a short stubby screw with a short half-thread and a thick rubber washer. Anyone know where this comes from??? Can’t see it in the Bambu spare screw kit on the bambu webpage and can’t find anything online. Or will I have to teardown the entire tool head and hope to find an empty hole? A little bit skeptical to try and print before finding the location for this damn thing. I’ve also flipped the printer upside down as there are a lot of screws beneath, but couldn’t see any obvious holes.



Thanks in advance.

I’ve taken the toolhead & the bed apart & don’t recognize it at all.
I even looked on the Wiki and didn’t see anything.

might be the under the bed screws you’re supposed to tighten on first setup as they ship loose

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Is it from the right side of the print head?

A1 Mini:
I just had a screw fall out of the tool head after doing a calibration.
Took the tool head apart & can’t find where it goes.
It might explain my Z-Offset issues I’ve been having lately, I put in a ticket.


I think it is from the plate behind the nozzle

I for got I posted in this thread, anyway…