What is this thing?

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Metal, about 1 inch in diameter (i.imgur.com)

submitted 2 years ago by [email protected] to c/[email protected]

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[–] LuckyDuck 11 points 2 years ago

The indentions on the side are for a spanner wrench to tighten this nut onto a threaded rod. The top is a decorative cover.

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