Mysterious Washer Found Under Truck

[AO_Pete]

I don't know for sure it's from the truck of course, but it was found under where it's always parked, and doesn't look like anything that would have come off anything I'd normally use. Anyone recognize it? I've asked the same of Rivian, but the chat was a 1hr+ wait, so emailed them.

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[zymolysis]

Officer Obie, I cannot tell a lie - I placed that washer under your truck.
But seriously, that's an interesting piece of hardware.

 

[COdogman]

That looks more important than your typical washer.?

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