For centuries now the screw has held things together, and for almost as long it has been frustratingly inept at its central purpose. Concrete cracks when it is punctured by a screw. Plastic creeps away from the pressure, sliding down the threads so that even a tightened screw loosens almost instantly. Carmakers have to mold brass inserts into plastic parts to accept screws; otherwise they might loosen and cause a dreaded rattle.
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