Mystery part on workshop floor

Does anybody identify this thing as a component from either a H2S/C, or AMS2/HT? I have succesfully converted my H2S to H2C in the days, and found this small metal piece on the bench i worked on after cleaning up. I have not seen this when doing the upgrade. Its outer diameter is 8mm, the inner is 5.5 and 3mm height. It has no thread, or keyhole.

Thats the end stopper for the filament tension screw on an h2s. Not sure the H2C uses it.

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Thanks for the information! I have no idea where is that part located, could You elaborate please? I have found the location in the maintenance manual, and disasembled the old H2S toolhead to find it in place. It is almost identical, but 1mm larger. But, this is very useful, because i think it maybe a similar part in the TPU feed assist, because I’ve assembled that today, shortly before i found the part. Thank you again!

Sorry I wasn’t clearer. Anyways, glad you found it, and it may appear in the TPU module, I’ve never disassembled one, but I have dropped that little part more than a few times. Its a bugger to get in place.

Alright, the mystery is solved. The TPU feed assist has a tensioning mechanism with a spring and cap like the H2S toolhead, without lever, only a screw. I removed that screw by mistake today…
I am grateful to the grave for the help!