Self-tapping and drilling screws are available in steel, carbon steel, and stainless steel. Gauge sizes range from 3.5 to 6.3mm, and lengths range from 12 to 120mm. When choosing the thread, consider the density of the wood. It’s best to use fine threads for hardwoods and coarse threads for softwoods. When choosing the thread, consider the density of the timber. It’s best to use fine threads for hard timber and coarse threads for soft timber. Drywall screws are used to attach plasterboard to light steel, wooden studs, or metal partitions. They’re typically lighter and have deeper threads than other types, enabling them to grip plasterboard securely and a sharp point so pre-drilling isn’t required. Types of screw heads for drywall screws include bugle, wafer, and countersunk. A bugle head sits flush with the plasterboard’s surface, a wafer head sits above the surface, and a countersunk head sits below the surface.

Grub screws: work using a pinning action that pushes two surfaces against each other, negating the need for a nut. They are often used in applications requiring a small, unobtrusive screw. With that subterfuge having resulted in the death of another inmate, Toby, she was now plagued with remorse (and also understandably worried about her involvement becoming public knowledge). Woodscrews are available in a range of materials such as carbon steel, hardened steel, zinc, stainless steel and solid brass. Brass is usually chosen for its appearance when combined with brass ironmongery such as hinges and door handles. Stainless steel is ideal for areas exposed to moisture, and carbon and hardened steel can be fitted without needing pre-drilled holes. In addition, all wood screw materials have high levels of corrosion resistance. They are available in gauge sizes ranging from 3 to 8mm and lengths from 12 to 300mm. Roofing screws are available in carbon steel and hardened steel. And, as they are most commonly used for outdoor applications, they have a coating that protects them from the elements and stops rusting. They’re available in gauge sizes ranging from 4 to 6.3mm and lengths ranging from 16 to 120mm.

When choosing masonry screws, consider the load it will bear, as different types are suitable for medium or heavy-duty loads. Consider the material you are screwing into. Self-tapping screws are suitable for fixing sheet metal to softwood or plastic, and self-drilling screws are best for sheet metal to steel. Self-tapping screws are screws that create their own thread as they are driven into a material, ensuring a strong, tight fit. They are best used in soft materials such as softwoods and plastic. A pilot hole that’s slightly smaller in diameter needs to be pre-drilled before fitting. If you are joining sheet metal to steel, choose self-drilling screws. But if you are joining sheet metal to wood, use timber roofing screws with a sharp point. Roofing screws are designed for attaching sheet metal to steel or wood as well as for other general exterior construction tasks. But they can also be used on internal jobs. The flanged (or washered) type of heads have a built-in washer that’s designed to reduce vibrations and stop the screws from loosening. And there are self-drilling and timber varieties available.

Coach screws: these are driven into materials using a spanner through a square or hexagonal head. They provide robust and heavy-duty fixing. Timber screws are specially designed for use on timber. They have an aggressive, coarse thread that grips wood securely into place. They come in various gauges, head and drive types, and sizes, meaning there is a choice of screw for any task. Anti-theft kit. Kit has a plastic wall marker, very useful with aluminium frames. Great for marking T-Screw positions Point: the end of the screw that’s first driven into the material when a rotational force is applied.Consider what material the plasterboard will be attached to, as different screws are suitable for different materials. For example, there are drywall to heavy steel screws, drywall to light steel screws, and drywall to wood screws. Those listed above are the most popular types, but there are other more specialist and less popular screw types available, such as: