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What is Wood Screw? Dimensions, Properties and Uses

Wood Screws

Wood screws are essential fasteners that ensure a secure and permanent hold when it comes to woodworking and DIY projects. But what exactly are wood screws, and what makes them different from other screws? This blog post will delve into wood screws, discuss their various dimensions and properties, and explore their various uses in woodworking and other applications.

What is Wood Screws?

A wood screw is a type of fastener, typically made from durable steel, that features an exterior thread which allows it to be driven into the material it attaches. Typically used for joining pieces of wood, screws have the benefit of providing secure connections and preventing damage to the surrounding area due to their unique design. The head type and size will depend on what they’re used for; while flat or round heads are commonly used, Phillips heads offer additional grip when driving them in with a screwdriver. Wood screws come in various sizes to accommodate different types of wood and projects—ensuring there’s always one available for whatever job you need.

Properties of Wood Screws

The strength and durability of wood screws come from their material and design. The most common material for wood screws is steel, with grades ranging from 2 to 8. The higher the grade, the stronger and more durable the screw is. Other materials like stainless steel and brass are also used for moisture-resistant or decorative applications. The threads on wood screws are usually coarse and deep, giving them a stronger grip on the wood.

Uses of Wood Screws

Wood screws are utilized in various applications, including furniture and cabinetry making, decking, flooring, and framing. They are also used in DIY projects like hanging shelves or curtain rods. Wood screws can be used with other fasteners like nails or bolts to provide additional support. Their versatility and reliability make them essential to builders, contractors, and DIY enthusiasts.

Types of Wood Screws

There are different types of wood screws available in the market. They are:

Flathead Wood Screws – A flathead wood screw has a flat top and is used for countersinking into wood. The top can be slotted or recessed.

Round Head Wood Screws – A round head wood screw has a curved top surface and is a more decorative option often used in cabinetry or furniture making.

Pan Head Wood Screws – A pan head wood screw has a flat top and slightly rounded sides, making it a versatile option for various applications.

Hex-Head Wood Screws – A hex head wood screw has a hexagonal top and is often used in tougher applications requiring increased torque.

Phillips Head Wood Screws – A Phillips head wood screw has a cross-head, making it easier to drive with a screwdriver.

Dimensions of Wood Screws

Wood Screws: Round Head Dimensions (ASME B18.6.1)
Nominal Size*

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Phillips Driver Size Head Diameter (A) Head Height (H) Width of Slot (J) Depth of Slot (T) Dimension of Recess
Max Min Max Min  Max  Min Max  Min Dia. Max (M) Dia. Min (M) Depth Max (G)  Depth Min (G) Width Min (N)
2 1 .162 .146 .069 .059 .031 .023 .048 .037 .114 .101 .064 .042 .018
4 2 .211 .193 .086 .075 .039 .031 .058 .044 .130 .117 .083 .063 .019
5 2 .236 .217 .095 .083 .043 .035 .063 .047 .154 .141 .074 .046 .027
6 2 .260 .240 .103 .091 .048 .039 .068 .051 .162 .149 .084 .056 .027
7 2 .285 .264 .111 .099 .048 .039 .072 .055 .170 .157 .092 .066 .028
8 2 .309 .287 .120 .107 .054 .045 .077 .058 .178 .165 .101 .075 .030
9 2 .334 .311 .128 .115 .054 .045 .082 .062 .186 .173 .110 .084 .030
10 2 .359 .334 .137 .123 .060 .050 .087 .065 .195 .182 .119 .093 .031
12 3 .408 .382 .153 .139 .067 .056 .096 .073 .249 .236 .125 .099 .032
14n 3 .457 .429 .170 .155 .075 .064 .106 .080 .265 .252 .142 .116 .034

Conclusion:

Understanding the dimensions, properties, and uses of wood screws is crucial to any woodworking DIY project. By selecting the right type of screw and knowing how to use them correctly, you can achieve a secure and reliable connection in your woodwork. Whether it’s a simple shelf or a more complex furniture piece, wood screws play a vital role in ensuring the success of your project. So, don’t overlook the importance of selecting the right wood screw for your next woodworking project.

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