Parametric 3/4" thread to round tube nozzle (for vacuum pumps or garden hosepipe or whatever)

I made it as a nozzle for a cheap hand vacuum pump with ¾" female thread. I use this pump with this adapter to remove the excess of air from plastic bags to protect filament spools from moisture.

I printed it with 16mm outer diameter as it corresponds to the diameter of the hole inside my pump. Default outer diameter for this model is set to 12 mm and can be used with garden hosepipes as well. You can set any inner and outer diameter in FreeCAD spreadsheet without modifying the parameters of the model itself, and everything will be calculated automatically. See “Spreadsheet” inner diameter and outer diameter parameters, set them as you need and export the model to STL.