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Fastener Categories
Fastener Categories (Continued)
Head Styles
Drive Types
Washer Types
Nut Types
Anchoring Products
Wood Screws
Wood screws have large threads for use in wood.
Wood screws
1. Phillips flat head
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
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.
Material
- Stainless steel 18-8
- A corrosion-resistant steel alloy. The most common stainless steel for general hardware use.
- Stainless steel 316
- A highly corrosion-resistant grade of stainless steel. Ideal in saltwater and chlorine environments.
- Zinc-plated steel
- 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. The exact color varies.
2. Frearson flat head
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
Note: These screws are not compatible with Phillips drivers/bits.
Flatheads are countersunk (cone-shaped under the head) with a flat top. Frearson’s drive is x-shaped, similar to (but not compatible with) Phillips.
Material
- Silicon bronze
- Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. The exact color varies.
3. Slotted flat head
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.
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
Material
- Stainless steel 18-8
- A corrosion-resistant steel alloy. The most common stainless steel for general hardware use.
- Zinc-plated steel
- 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. The exact color varies.
- Silicon bronze
- Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. The exact color varies.
4. Slotted oval head
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
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.
Material
- Stainless steel 18-8
- A corrosion-resistant steel alloy. The most common stainless steel for general hardware use.
- Brass
- Solid brass. An alloy of primarily copper and zinc with good corrosion resistance. Used mostly in decorative and electrical applications. The exact color varies.
- Silicon bronze
- Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. The exact color varies.
5. Phillips round head
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
Round heads are domed and look like half of a sphere. Phillips drive is x-shaped for installation with a phillips screw driver.
Material
- Zinc-plated steel
- 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. The exact color varies.
6. Slotted round head
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
Round heads are domed and look like half of a sphere. Slotted drive has a simple slot for a flat bladed screw driver.
Material
- Stainless steel 18-8
- A corrosion-resistant steel alloy. The most common stainless steel for general hardware use.
- Zinc-plated steel
- 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. The exact color varies.
- Silicon bronze
- Solid bronze. An alloy of copper with greater strength and corrosion resistance than brass. The exact color varies.
7. Square flat head w/ nibs, type 17
Important Note: Wood screws can be manufactured with a cut thread or a rolled thread. While the thread diameter is uniform to both manufacturing processes, the shank diameter can vary.
Type 17 screws have an auger point. Countersinking nibs aid in material removal.
Flatheads are countersunk (cone shaped under the head) with a flat top. Square drive is designed to reduce the risk of cam-out (stripping) and allow single-handed installation.
Material
- Zinc-plated steel
- Low carbon steel for general use. Zinc plated for moderate corrosion resistance.
- Lubricated finish steel
- Low carbon steel for general use. Lubricated to ease installation.
Machine screws
Units
*US
1. Phillips pan head
Pan heads are slightly rounded with short vertical sides. Phillips drive is x-shaped for installation with a phillips screw driver.
Material
- 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.
- Stainless steel 316
- A highly corrosion-resistant grade of stainless steel. Ideal in saltwater and chlorine environments.
- Zinc-plated steel
- Low carbon steel for general use. Zinc plated for moderate corrosion resistance.
2. Star drive pan head
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).
Material
- Stainless steel 18-8
- A corrosion-resistant steel alloy. The most common stainless steel for general hardware use.
3. Spanner pan head
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.
Material
- Stainless steel 18-8
- A corrosion-resistant steel alloy. The most common stainless steel for general hardware use.
4. Phillips flat head
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.
Material
- 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.
- Stainless steel 316
- A highly corrosion-resistant grade of stainless steel. Ideal in saltwater and chlorine environments.
- Zinc-plated steel
- Low carbon steel for general use. Zinc plated for moderate corrosion resistance.
*Metric
1. Phillips pan head
Pan’s heads are slightly rounded with short vertical sides. Phillips drive is x-shaped for installation with a Phillips screwdriver.
- Stainless steel 18-8 (A-2)
- Also known as A-2 stainless, 18-8 is the most common grade of stainless steel for general use.
- Stainless steel 316 (A-4)
- Also known as A-4 stainless, 316 is a highly corrosion-resistant grade of stainless steel. Ideal in saltwater and chlorine environments.
- Zinc-plated steel
- Low carbon steel for general use. Zinc plated for moderate corrosion resistance.
- Nylon 6/6
- General-purpose nylon is often used in fasteners for corrosion resistance.
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READ: Rivets – Types, Failures Of Riveted Joint, Terms Used In Riveting
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