Flat heads are countersunk (cone shaped under the head) with a flat top. Star drive is a Torx® compatible drive, designed to minimize the risk of cam-out (stripping).
Stainless steel 18-8
The most common stainless steel for general hardware use.
Round heads are domed and look like half of a sphere. Slotted drive has a simple slot for a flat bladed screw driver.
Stainless steel 18-8
The most common stainless steel for general hardware use.
Zinc plated steel
A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
Brass
Solid brass. An alloy of primarily copper and zinc with good corrosion resistance. Used mostly in decorative and electrical applications. Exact color varies.
Silicon bronze
Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. Exact color varies.
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