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Self Tapping Screws

From thin sheet metal to heavy-duty plastics, our professional self-tapping screws are engineered for fast, precision threading and a secure, vibration-resistant hold.

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We carry 50,000+ stock lines in our warehouse in Bridgwater, Somerset and are adding more lines to the website daily. However if there is a product or tool we do not stock and you know what you need, please contact us and we are happy to see if we can source it for you

Or need help deciding which item meets your needs? Contact our expert team at Electro South West Ltd for technical advice on the best product for your specific project.

Frequently Asked Questions

What are self‑tapping screws used for?

Self‑tapping screws are designed to cut their own thread as they’re driven, making them ideal for fastening into metal, plastics and thin materials without pre‑tapping.

Do I need to drill a pilot hole for self-tapping screws?

While self-tapping screws are designed to cut their own thread, you generally still need to drill a pre-sized pilot hole in harder materials (like sheet metal) to guide the screw and prevent the material from warping or the screw from snapping. The exception is "self-drilling" screws (often called Tek screws), which feature a built-in drill-bit point to drill and tap in one fluid motion.

Should I choose zinc-plated or stainless steel self-tappers?

Zinc-plated screws are exceptionally durable and cost-effective for indoor, dry environments. However, if your project is outdoors, exposed to the elements, or situated in a corrosive coastal or industrial environment, stainless steel (A2 or A4 grade) is absolutely essential to prevent rust and maintain long-term structural integrity.