Impossible 3D-printed bolt and nut

youmagine

The "Impossible Bolt and Nut" is a playful three-dimensional printable two-part assembly with a functioning thread, where a nut is trapped on a bolt. A single STL file contains the nut positioned at a slight distance from the bolt's head, with a gap between them sized to create a fracture plane, allowing the nut to be removed from the bolt's head. We have provided several STL files scaled to fit commonly available 3D-print heights. Select the one that best matches your desired print height for optimal results. You can also successfully scale the STL file up or down if needed. For more information on how to 3D-print this bolt and nut, please refer to the instructions. Additionally, be aware that some slicing software may interpret the air gap as an STL defect and remove it during printing. To avoid this, disable the STL heal function before printing.