I've tried this on some M6 threads in 6061 aluminum with the 2D -> Thread option in Fusion 360. Turning at 4500 rpm, feed rate 320 mm /min, two passes at 0.15 mm pitch, thread pitch 1 mm, thread diameter offset 1 mm. Important: Select "Center to Center" in the linking options! Cut a large thread with the right fit. You can adjust the fit with more/less headroom in the Fusion if you like. The first time he inserted the cutter into the bottom of the hole my heart was in my throat, but he "gap…