The Crystal Palace is the earliest known building to use Whitworth screw threads, later known as British Standard Whitworth (BSW), the first national screw thread standard in the world.

Mate the old and new for a perfect match ... As a side note, wood screws typically have coarser threads than metal screws (pictured) so that should narrow your search considerably.

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.

According to John Gardner, a professor of English literature at Anglia Ruskin University (ARU), the Crystal Palace relied on a revolutionary screw thread designed by a man named Joseph Whitmore.

The guys from the YouTube channel How To Make Everything have been looking at one such sketch, a screw thread-cutting machine. At first glance, it seems a little flawed. Threads are hard to make ...