• LuckyDuck@lemmynsfw.com
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    1 year 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.

    • CmdrShepard@lemmy.one
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      1 year 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.