Part of that is probably because we’ve gotten so good at making them that they’re seen as cheap commodities, but the physics and engineering behind the screw thread is interesting stuff.

Off course, you can also print the threads directly, screw a bolt into an un-threaded ... while CA was comparable to plastic threads, failing at 52 kg. TLDR: Print your threads for best results ...

The Fraunhofer Institute is transforming millions of metric tons of household plastic waste into high-quality 3-D printed ...