this post was submitted on 09 Oct 2023
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What is this thing?

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Let us help you identify that mysterious object you’ve found.

Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.

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[–] [email protected] 3 points 1 year ago

Looks like a spanner nut and the cap appears to be a jam screw to lock it in place.