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A Review Of screws

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There are 2 kinds of hex screws: An Allen screw contains a hexagonal indent in The top, requiring an Allen wrench, and one other form has no indent inside the hexagonal head and must be used or taken out with a socket wrench. Thread forming screws are much like thread https://sethtvtro.bloggazzo.com/28084024/getting-my-wood-screws-to-work

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