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.

Head: The top of the screw, which includes the drive. Shank: The smooth area of the fastener between the head and the thread. Screw types vary and some screws do not have a smooth shank.

Off course, you can also print the threads directly, screw a bolt into an un-threaded hole, or tap a hole. Following his usual rigorous testing process, [Stefan] from CNC Kitchen investigated ...