stl file is missing a part of my object

[Anonymous]

The .stl file is missing a part of my object. In the end I'd like to print this object.
Question is:

How to export thread geometry from Fusion 360 to STL file?

[davebYYPCU]

Edit the Hole / Thread Command, and tick the box for Modelled.  Currently it is unticked.

Might help....