Dating antique furniture screws
If it's being used in an 1850s pie safe or dry sink, it's a FAKE!
If a single piece of wood has varying thicknesses, it is NOT machined - it is hand planed to smooth the surfaces.
Faced with a situation that calls for a cool head we can turn ourselves into James Bond or Grace Kelly.
On your next antique expedition, you might try assuming the role of Sherlock Holmes.
A piece of furniture made from uniformly thick wood is not a hand made piece no matter what form it takes and no matter what kind of distressing it displays.