More information: John Gardner et al, Thread form at the Crystal Palace, The International Journal for the History of Engineering & Technology (2024). DOI: 10.1080/17581206.2024.2391984 ...

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.

Sellers called his talk, "On a Uniform Standard of Screw Threads". He complained that American nuts, bolts and screws were all individually made by hand, and that they still had to be hand-matched ...