Dear FreeCad users,

I am not a FreeCad expert, so maybe I completely overlook something.

There is a model which I made - to be printed in 3D - where I needed explicitly the thread to be modelled.

So I used the fastener module to form a screw and did a boolean cut operation.

It worked well two times, but interestingly, when I export the model into step, it shows a different geometry.

Somehow a geometry that used to be 1-3 iterations before.

Can you help me there?

This is the original model:
This is the resulting step file:
The exported body did not show any errors.

Kind regards,

Martin

FreeCAD 0.19-19609

Mac OS X 10.15.3