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Self Tapping Screws.

Self Tapping Screws

What are Self Tapping Screws?

Self tapping screws are a specialised type of fastener distinguished by their unique ability to tap their own threads into pre-drilled pilot holes in metallic or non-metallic materials. These components feature a sharp cutting tip which forms the thread, eliminating the need for a separate tap. The versatility of self tapping screws for metal and plastic makes them indispensable in precision engineering and assembly. Not sure on if you should choose self-drilling or self-tapping screws? you can read our article to learn the differences and make an informed purchase.

How Metal Self Tapping Screws Work.

Self tapping metal screws are designed for efficiency and convenience, creating secure fastenings without the need for nut pairing or pre-tapping. They are commonly utilized in scenarios where disassembly and reassembly are required, serving well in electronics, automotive applications, and metalwork. For example mounting components within electronic devices or securing the door of an access panel within a HVAC installation.

What Materials Self Tapping Screws Are Made From.

At Accu, we pride ourselves on offering self tapping screws for plastic and metal in premium A2 and A4 Stainless Steel. These stainless steel self tapping screws provide durability and resistance to corrosion, making them ideal for both indoor and outdoor applications. Additionally, our black self tapping screws, treated with AccuBlack chemical blackening, offer an additional layer of protection and aesthetic appeal for those looking for that stealth look that also reduces reflections.

Sizes and Types of Self Tapping Screws for Metal.

In short, our range spans from the miniature No.2 (2.2mm) to a robust No.14 (6.3mm) thread diameter with lengths between 4.5mm and 127mm. We cater to a variety of applications with different head types, including the popular countersunk self tapping screws which sit flush with the surface or the most popular pan head all in a range of drive types including Pozi, Phillips Hex and Torx. Custom manufacturing services are available to meet specific requirements, ensuring you find the exact self tapping screw sizes for your project.

In line with self tapping screws, we also supply a comprehensive range of self-drilling screws designed to not only tap their own threads, but form their own pilot hole too.


What is the difference between self-tapping screws and regular screws?.

The difference between self-tapping and regular screws is that self-tapping screws are designed to form their own threads within a pre-drilled hole, while regular screws require a nut or a pre-threaded hole to be installed correctly.

When should you use a self-tapping screw?.

Self-tapping screws are an amazing component for when you need a fast, reliable, and removable connection in materials where you cannot use a nut or pre-threaded hole.

How thick of metal can self-tapping screws go through?.

The capacity of the self-tapping nature of these screws depends on the thickness and the hardness of the material they're being installed into. Keep in mind they are typically used for thin gauges of metal and would likely struggle if the thread you are expecting to tap is the same length as the screw. In these scenarios, it would be advisable to tap the hole and install a traditional machine screw.

Will self-tapping screws come loose?.

If installed correctly, self-tapping screws are designed to stay secure as they typically have a higher frictional force than regular screws. However, they can loosen under vibration if not properly tightened or if a locking feature is not employed such as anti-virational locking washers.

Can self-tapping screws hold weight?.

Yes, self-tapping screws can hold weight, but the amount depends on the screw's size, design, and the material it's fastened into. If this is project-critical, we'd advise discussing your needs with one of our engineers so that we can support you in finding the best component for your needs.

What is the difference between self-tapping screws and thread-rolling screws?.

Self-tapping screws cut a thread and are used in materials like metal and plastic, while thread-rolling screws displace material to form threads and are typically used in softer materials. Usually self tapping screws are not intended to be used in harder materials such as sheet metals.

Bespoke Self Tapping Screws Manufacture.

High precision, bespoke manufacture of Self Tapping Screws to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.

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