What is this thing?

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

submitted 11 months ago by ultimike@lemmy.world to c/whatisthisthing@lemmy.world

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[–] LuckyDuck@lemmynsfw.com 12 points 11 months ago (1 children)

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

[–] CmdrShepard@lemmy.one 2 points 11 months ago* (last edited 11 months ago)

The hole looks like it's for a set screw to me, but I agree the cap is just a decorative cover. Not sure what this would be used for though as I don't understand what function a collar and cap like this would do mechanically.

Edit: I see OP mentioned the holes don't go through so you're right they'd be for some special tool.