There are many different types of screws, each designed for a specific purpose. Some common types of screws include:
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Wood screws: These are designed for use in wood and have a sharp thread that allows them to easily grip the material.
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Sheet metal screws: These screws have a sharp thread and a small head, making them ideal for use in thin sheets of metal.
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Machine screws: These screws are used with nuts to fasten metal parts together.
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Self-tapping screws: These screws are used to tap their own threads as they are driven into a material, eliminating the need for a separate tapping operation.
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Lag screws: These screws are used to secure heavy timbers or to connect wood to metal. They have a large, square head and a long, thick shank.
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Drywall screws: These screws are used to attach drywall to wood or metal studs. They have a fine thread and a small, low-profile head.
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Deck screws: These screws are used to construct decks and other outdoor wood structures. They are corrosion-resistant and have a special thread design that helps them grip wood securely.