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Wood screws have large threads for use in wood.
An alloy of steel with high corrosion resistance.
A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
Solid brass. An alloy of copper with good corrosion resistance. Used mostly in decorative applications. Exact color varies.
Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. Exact color varies.
Screws with large threads for use in sheet metal sometimes also used in plastic, fiberglass, or wood.
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