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The Definitive Guide to screws

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There are two kinds of hex screws: An Allen screw includes a hexagonal indent in The top, necessitating an Allen wrench, and the opposite form has no indent during the hexagonal head and must be applied or eliminated using a socket wrench. Thread forming screws are much like thread cutting https://jeffreyoqoli.bloggip.com/28569793/the-greatest-guide-to-screws

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