This a Spiral nut designed Using SelfCAD software. SelfCAD is a browser-based 3D modeling and sculpting software that allows one to model, sculpt and print all under one program. It's easy to use yet powerful and it's free for students and educators.
You can learn more about SelfCAD here:
Youtube Channel: https://www.youtube.com/selfcad
Step By Step Instructables: https://www.instructables.com/sammy50
Sign up to SelfCAD and launch the Software
-Model and downloaded the STL file and send it to the printer