Found 2 3D-models for “magic bolt and nuts” across many websites

#double threaded bolt#multi-thread bolt#multi-thread screw#double thread screw#magic bolt and nuts
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Magic bolt (Nuts will go to different direction when rotating)(double threaded bolt)

Magic bolt (Nuts will go to different direction when rotating)(double threaded bolt)

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These multi-thread screws are satisfying, they can play music

These multi-thread screws are satisfying, they can play music

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