The document provides instructions for creating 3D models of a glass and a threaded bolt in AutoCAD: 1. To create a glass, extrude a circle, then use the Shell command to hollow out the solid by removing its top face. 2. To create a bolt, revolve a polyline profile to form the rod, then use cylinders and extrusions to model the head and threads. 3. The helix command is used to create the threads, which are then swept around a triangular profile to give them their distinctive shape. 4. Finally, all the pieces are combined using union to form the complete 3D model of the threaded bolt.