A guide to the different types of screw tips

A successful project often comes down to the smallest details. While often overlooked, the tip design directly affects how well a screw engages with a material, how efficiently it can be driven and how strong and secure the final connection will be.

Choosing the correct screw tip design can directly impact the efficiency, quality and reliability of any fastening task. A well-matched screw tip reduces the amount of torque required to drive the screw, which not only makes installation faster and smoother but also puts less strain on tools. This becomes especially important in high-volume environments where time and productivity are key.

Using the appropriate tip also helps to protect the integrity of the material. With the right design in place, risks such as wood splitting, surface damage or thread stripping are significantly reduced. This ensures a cleaner, more precise finish and avoids costly rework or product damage.

When selecting the correct fastener, it's important to understand the anatomy of a screw. The tip of the screw is responsible for determining how easily the screw can be driven into the material and how secure the final connection will be. A well-designed screw tip improves driving efficiency and provides a more secure grip, reducing wandering on hard surfaces like sheet metal and loosening over time due to vibration.

Different types of screw tip designs

All screw tip types fall into one of three categories: self-tapping tips, self-drilling tips and, most commonly at Accu, thread forming machine tips. Each category is defined by how the tip interacts with the material, whether it's designed to tap, drill and form its own threads.

When it comes to self-tapping screws, the tip design is key to their performance. These screws are engineered to form their own threads within a pre-drilled pilot hole, eliminating the need for pre-threaded inserts or nuts. Once placed in a pilot hole, their specially designed tips cut or shape threads into the surrounding material. This makes them incredibly versatile for light to medium-duty applications where precision and ease of use are important, offering reliable fastening solutions across a wide range of materials, including wood, plastic and thin metals.

One of the most common self-tapping tip styles is the Type AB point. Recognised for its sharp, conical tip and coarse threads, the Type AB screw is ideal for use in punched, pilot or nested holes, particularly in thin sheet metals ranging from 0.05mm to 0.5mm thick. These tips are also ideal for use in softer materials like plywood, softwoods and certain plastics.

The fine point of the Type AB tip helps initiate entry smoothly and consistently, reducing installation effort and minimising the risk of material damage. Its design ensures a strong grip and dependable hold, even in delicate or thin substrates.

Drilling and fastening in one step with self-drilling screw tips

Designed with a drill-like point, self-drilling screw tips allow the screw to bore its own hole as they are driven into a material. This eliminates the need for a separate pilot hole, streamlining installation and saving valuable time, especially in tougher materials like steel.

By drilling and fastening in one step, self-drilling screws not only simplify the process but also ensure a strong and secure connection in the material. They are a go-to choice in sheet metalwork and other applications which demand high performance and precision.

When it comes to woodworking applications, Type 17 screw tips are particularly popular as they feature a flattened and sharp cutting edge. This design helps to reduce splitting and minimise damage in soft or hard woods, making them ideal for decking, fencing and general timber projects.

For denser materials like structural timber, Type 25 screw tips offer a deeper engagement and superior holding power, thanks to their coarse threads. This makes them perfect for heavy-duty framing and load-bearing applications.

Creating threads without cutting with thread-forming tip types

Thread forming screw tips are designed to create internal threads by displacing material, rather than cutting it. Unlike traditional cutting screws, they feature a blunt or rounded point with shallow thread profiles that press material aside during installation. This forms a durable and vibration-resistant thread without producing swarf or debris.

The swarf-free fastening not only keeps the work environment cleaner but also minimises installation torque and reduces the risk of damaging the material. This makes thread forming screws especially suitable for softer materials, plastics and thin sheet metals where preserving substrate integrity is essential.

In industrial and manufacturing settings, thread-forming screws offer reliable and efficient performance. For heavier sheet metals, Type C screw tips are commonly used. These screws feature a blunt, tapered point combined with a coarse or fine-pitch machine screw thread, enabling the screw to form its own threads securely without cutting into the material.

For applications that require easier alignment and better penetration, Type CA screw tips are a great alternative. With a sharp and tapered point, Type CA tips improve accuracy and reduce the risk of surface damage, making them ideal when precision and material preservation are important.

Selecting the correct screw tip

Choosing the correct fastening component is an important decision that directly impacts the installation process, quality of the finished project and long-term performance. By understanding the different types of screw tips and their suitability for specific applications, engineers can save installation time, reduce material damage and minimise wear on tools.

Most importantly, using the correct tip helps to ensure a more secure and stable connection. This reduces the risk of fasteners loosening over time due to vibration or load stress, making projects more durable and reliable in the long run.