Install openscad-mcad by entering the following commands in the terminal:
sudo apt update sudo apt install openscad-mcad
Description:
library for the OpenSCAD 3D modeling software
The MCAD library is a collection of modules and functions for OpenSCAD. It contains boxes, gears, screws, and several generic shapes. . The library is a kind of a standard library for OpenSCAD.
Homepage: https://github.com/openscad/MCAD
Version: 2014.03-1
Section: universe/graphics