Machine screws
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Pan heads are slightly rounded with short vertical sides. Phillips drive is x-shaped for installation with a phillips screw driver.
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Stainless steel 18-8
A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
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Stainless steel 18-8 black oxide finish
A corrosion resistant steel alloy. The most common stainless steel for general hardware use. A chemically produced coating that leaves the steel surface with a matte black finish and offers mild corrosion resistance.
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Stainless steel 316
A corrosion resistant steel alloy. A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.
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Zinc plated steel
A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
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Pan heads are slightly rounded with short vertical sides. Star drive is a Torx® compatible drive, designed to minimize the risk of cam-out (stripping).
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Pan heads are slightly rounded with short vertical sides. Spanner (a.k.a. snake eyes) is a tamper resistant drive that requires a special driver to install.
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Flat heads are countersunk (cone shaped under the head) with a flat top. Phillips drive is x-shaped for installation with a phillips screw driver.
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Stainless steel 18-8
A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
-
Stainless steel 18-8 black oxide finish
A corrosion resistant steel alloy. The most common stainless steel for general hardware use. A chemically produced coating that leaves the steel surface with a matte black finish and offers mild corrosion resistance.
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Stainless steel 316
A corrosion resistant steel alloy. A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.
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Zinc plated steel
A low carbon steel for general use. Zinc plated for moderate corrosion resistance.
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Flat heads are countersunk (cone shaped under the head) with a flat top. Slotted drive has a simple slot for a flat bladed screw driver.
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Stainless steel 18-8
A corrosion resistant steel alloy. 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.
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Brass
Solid brass. An alloy of primarily copper and zinc with good corrosion resistance. Used mostly in decorative and electrical applications. Exact color varies.
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Silicon bronze
Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. Exact color varies.
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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).
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Flat heads are countersunk (cone shaped under the head) with a flat top. Spanner (a.k.a. snake eyes) is a tamper resistant drive that requires a special driver to install.
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Flat heads are countersunk (cone shaped under the head) with a flat top. Star pin-in is a tamper resistant drive that requires a special driver to install.
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Oval heads are countersunk (cone shaped under the head) with a rounded top. Phillips drive is x-shaped for installation with a phillips screw driver.
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Stainless steel 18-8
A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
-
Stainless steel 316
A corrosion resistant steel alloy. A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.
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Oval heads are countersunk (cone shaped under the head) with a rounded top. Slotted drive has a simple slot for a flat bladed screw driver.
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Oval heads are countersunk (cone shaped under the head) with a rounded top. Spanner (a.k.a. snake eyes) is a tamper resistant drive that requires a special driver to install.
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Truss heads are wide with a low profile rounded top. Phillips drive is x-shaped for installation with a phillips screw driver.
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Stainless steel 18-8
A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
-
Stainless steel 316
A corrosion resistant steel alloy. A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. More expensive than 18-8.
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Truss heads are wide with a low profile rounded top. Slotted drive has a simple slot for a flat bladed screw driver.
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Truss heads are wide with a low profile rounded top. Combination drive can be used with either a flat bladed or phillips screw driver.
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Truss heads are wide with a low profile rounded top. Star drive is a Torx® compatible drive, designed to minimize the risk of cam-out (stripping).
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Round heads are domed and look like half of a sphere. Slotted drive has a simple slot for a flat bladed screw driver.
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Stainless steel 18-8
A corrosion resistant steel alloy. 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.
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Silicon bronze
Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. Exact color varies.
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Nylon 6/6
A general purpose nylon often used in fasteners for corrosion resistance.
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Round heads are domed and look like half of a sphere. Combination drive can be used with either a flat bladed or phillips screw driver.
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Round heads are domed and look like half of a sphere. One way drive is installed with a flat bladed screw driver but cannot be removed without special tools.
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Button heads are rounded and low profile. Star pin-in is a tamper resistant drive that requires a special driver to install.
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Sidewalk bolts have a wide, low profile head and are often used in hurricane shutter installation. Slotted drive has a simple slot for a flat bladed screw driver.
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Sidewalk bolts have a wide, low profile head and are often used in hurricane shutter installation. Combination drive can be used with either a flat bladed or phillips screw driver.
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