[On Linux KiCad V8.0.6]
In one project I’m using these SMT (M3 screw) connectors
And its Plated Through Hole footprint is as simple as this
However when I inspect the generated gerbers for the stencil I find a large circumference filled with paste but what I expect is just a corona instead. Or am I wrong?
The Gerbers are 100% expected.
If you want an annular paste mask, you are going to have to build it yourself.
Indeed If you look at this part of your screenshot:
It shows that your simple circular pad is on the copper layers and on F.Paste. To go forward, disable the F.Paste layer, and then add Aperture Pads for whatever features you want on the F.Paste layer.
Some considerations:
I’d consult with whoever is assembling the boards.
This is not an unusual thing, and they’ll be able to answer what the preferred paste maske should look like.
The datasheet has a “stencil suggestion”. It looks like this:
Thanks you all for the suggestions. Yes, it seems that the result is correct but I was initially shocked by the idea that there could be paste in a hole. Okay, I understand this and I will consider other options for the footprint.
My assembly house says this is good because, during the dispensing process, the ‘extra’ paste will eventually run down the walls of the metallised hole and strengthen the solder 
Or, it could run into the standoff itself and ruin the thread. Stick to the recommended stencil opening; we’ve used it on thousands of these things without issue.
If you think carefully how the stencil is made and used you will understand why it’s impossible to have a circular “corona” there. Spokes like in the image by Rob is the only option if you don’t want paste in the hole.
You are absolutely right. Now that I realise I asked a silly question.
