At 1m33 [0], you can see the thing in an Ultimaker 3D printer, but as other commenters say, the threads are likely tapped. I have seen 3D printed threads, but n

At 1m33 [0], you can see the thing in an Ultimaker 3D printer, but as other commenters say, the threads are likely tapped. I have seen 3D printed threads, but not that fine, at least not with FDM [0] https://youtu.be/NFvMC3l3fGY?t=1m33s https://youtu.be/NFvMC3l3fGY?t=1m33s