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Who invented the screwthread?

 

Original Question:

Who invented the screwthread? (posed by Karel Vandeschoor)

Answer:

The wikipedia has all this type of info in http://en.wikipedia.org/wiki/Screw (as sent by Mark Nichols)

The screw as concept is very old, the question of using the thread on a device to fasten things is more vague, but again the development was probably very gradual and as usual the screw as a device became widespread only after machines could make them cheaply.

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