M6 Knurling with and without M6 Nut inlay

I needed an M6 knurling and printed pure plastic variants as well as one with M6 metal nut inlay which is the strongest.

I used Formfutura ASA (ApolloX) and it is already pretty strong as well when cutting M6 threads into it without the inlay. Good enough for normal application.

Jfyi, to add the M6 Nut inlay, you need to stop the 3D printer at the right layer, insert the M6 nut, and continue printing. With cura it is doable through the menu “Extensions–>Post Processing–> Modify G-Code–>Pause at Height”

Fusion 360:
M6 Knurling with nut inlay – regular height M6 Nut should fit
M6 Knurling with washer – you need cut threads with a tool