It boggles the mind, mine at least, how finely and precisely made screw threads can be! This, to the point where they are indeed the controlling factor in most high precision machine tools and many metrology instruments.
Here is a nice video describing the rather amazing history of the supposedly simple screw thread:
https://youtu.be/isVQMHmzHNo?si=8JUcfm7uLv3yKWUf

Logged
"Information is not knowledge, Knowledge is not wisdom, Wisdom is not truth, Truth is not beauty, Beauty is not love, Love is not music: Music is THE BEST...
Wisdom is the domain of the Wis (which is extinct). Beauty is a French phonetic corruption of a short cloth neck ornament currently in resurgence..."
F. Zappa ... by way of Mary, the girl from the bus.