With the advent of metallurgy, metal screws became more common. They offered greater strength and durability compared to wooden screws. One of the earliest metal screws was the wood screw, which had a tapered shank and a thread that cut into the material as it was tightened. Another type was the machine screw, which had a straight shank and a thread designed for use in machinery.
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2025-08-14 05:01
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