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Wood screws have large threads for use in wood.
The most common stainless steel for general hardware use.
A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.
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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