An impossible hexnut modeled after the impossible torus.
The figure above shows three impossible figures: the ambihelical hexnut in the lower left-hand corner, tribox in the middle, and impossible fork in the upper right.
Ambihelical Hexnut
See also
Impossible Figure, Impossible Fork, Impossible TorusThis entry contributed by Margherita Barile
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Cite this as:
Weisstein, Eric W., with contributions by Margherita Barile. "Ambihelical Hexnut." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/AmbihelicalHexnut.html