The Ultimate Guide To Exterior Screw Head Types

Exterior screw heads are an essential component of any outdoor construction project, providing a secure and durable fastening solution for a range of applications. From decking to wood screws, the choice of exterior screw head can significantly impact the overall strength and longevity of the build. With various head styles, drives, and coatings available, selecting the appropriate exterior screw head can be a challenging task. This is further complicated by the need to consider factors such as corrosion resistance, pre-drilling requirements, and the overall finished look of the project. Understanding the unique characteristics and suitability of different exterior screw heads is, therefore, crucial for both professionals and DIY enthusiasts alike.

Flat-head wood screws

Exterior screw heads are available in a variety of shapes, including flat-head, bugle head, round head, and hex head. Flat-head wood screws are a commonly used type of screw with a countersink, which is the bevelled surface under the head. When the screw is seated, the top of the flat head is flush with the material. The angle of the countersink is typically between 80 and 82 degrees, but variations exist, with some European hardware requiring a 90 or 100-degree head angle.

When choosing flat-head wood screws, it is important to consider the length, material, and drive type that best suit your specific application. Additionally, the angle of the countersink and the need for features like nibs should be taken into account to ensure a secure and aesthetically pleasing fastening solution.

Bugle head coarse thread screws

These screws are often sold in packs of different quantities, such as 1 lb. or 5 lbs. boxes, and can be purchased from hardware stores like Home Depot. Some screws are also available in larger contractor packs, such as the GRK Fasteners Star Drive Countersinking Torx Bugle Head Multi-Purpose Screw Extended Contractor Pack, which contains 630 pieces.

Hex drive connector screws

One example of a hex drive connector screw is the Simpson Strong-Tie Strong-Drive SD Connector Screw. This screw is designed for structural construction applications and is available in two sizes: #9 x 1-1/2 inch and #10 x 1-1/2 inch. Both options are available in a 100-pack and feature a 1/4-inch hex drive. The Simpson Strong-Tie brand is known for its high-quality construction products, offering strength and easy installation.

Another option for hex drive connector screws is the Everbilt Hex-Drive Connecting Bolt. These bolts are available in various lengths, including 40 mm, 50 mm, and 60 mm, and feature a 1/4-inch hex drive. The bolts are made from antique brass steel or zinc-plated brass and are sold in packs of four. Everbilt is a trusted brand for fasteners and hardware, offering a range of connecting bolts for various applications.

When choosing hex drive connector screws, it is important to consider the length and size required for your specific application. Additionally, the type of material and finish of the screws should be selected based on the project's specific needs, such as corrosion resistance or aesthetic preferences.

Self-drilling sheet metal screws

When choosing self-drilling sheet metal screws, it's important to consider the specific requirements of your project, such as the diameter, length, head and drive style, material, and finish.

Flat head cement board screws

Flat-head cement board screws are a type of screw with a flat head that is used for attaching cement boards to wood or metal studs. They are designed to work with all backer boards and are ideal for use in showers, backsplashes, countertops, and floors. The flat head design allows for a flush finish with the surface of the cement board, providing a smooth and even appearance.

One example of a flat-head cement board screw is the Pro-Twist #8 x 1-1/4 in. #2 Phillips Flat Head Fiber Cement Board Screw. This screw is made from high-quality steel for strength and durability and is designed for interior cement board applications. It has a coarse thread for hanging cement boards and can be hand-driven or installed using a standard screw gun.

Another option is the Backer-On #9 x 1-5/8 in. Serrated Flat Head Star Drive Cement Board Screws. These screws are corrosion-resistant and suitable for use with Hardibacker, backerboard, and cement board. They feature a star drive head and are available in a pack of 140.

When installing flat-head cement board screws, it is important to use the correct type of screw gun and drive bit to avoid over-torqueing, which can cause the screw head to snap or strip. The installed fasteners must penetrate a minimum of three full threads beyond the metal structure or embed into a wood substrate by at least 1/2".

Flat-head cement board screws provide a secure and durable fastening solution for cement board installations, ensuring a strong and long-lasting hold.

Frequently asked questions