Self Tapping Screws

About Self Tapping Screws

Self tapping screws are essential fasteners that create their own thread as they're driven into materials, eliminating the need for pre-drilling or tapping. MyToolShed.co.uk stocks a comprehensive range of self tapping screws from trusted brands including Timco, Sealey, Trend, and Draper, available in various head styles including pan head, countersunk, and flange head configurations. These versatile fasteners are supplied in both individual packs and convenient assortments containing up to 1,305 pieces.

Our selection includes screws in multiple finishes such as bright zinc plated (BZP) for corrosion resistance, stainless steel for marine and exterior applications, and black coated options for discreet installations. Whether you need PVC window screws with shallow pan heads, drill point variations for harder materials, or Pozi drive configurations for enhanced grip, MyToolShed offers professional-grade fixings suitable for both trade and DIY applications.

Applications

Self tapping screws are widely used across numerous trades and applications:

• Window and door fitters – securing PVC frames, hinges, and hardware
• Roofers and cladding specialists – fixing metal sheeting and corrugated panels
• Electricians – mounting junction boxes, cable trays, and trunking
• HVAC engineers – installing ductwork and ventilation systems
• Metal fabricators – joining sheet metal components
• Automotive and vehicle repair – body panels and interior trim
• Carpenters and joiners – fixing brackets, hinges, and metal hardware
• General maintenance – repairs and installations across light-gauge materials

Choosing The Right Self Tapping Screws

Consider these key factors when selecting self tapping screws for your project:

• Head style – Pan heads offer good load distribution, countersunk heads sit flush with surfaces, whilst flange heads provide larger bearing surfaces without washers
• Material thickness – Match screw length to your application, ensuring adequate thread engagement without breakthrough
• Substrate type – Drill point screws penetrate harder materials, whilst standard points suit softer metals and plastics
• Corrosion resistance – Choose BZP for general interior use, stainless steel for exterior or marine environments
• Drive type – Pozi drive offers superior torque transfer and reduced cam-out compared to standard cross-head designs
• Assortment vs individual packs – Workshop and maintenance environments benefit from mixed assortments, whilst specific projects require uniform sizes

Frequently Asked Questions

Do self tapping screws need a pilot hole?

Self tapping screws generally don't require pilot holes in softer materials like aluminium, plastic, or thin sheet metal. However, drilling a small pilot hole in harder metals or thicker materials prevents stripping and ensures accurate placement whilst reducing driving torque.

What's the difference between self tapping and self drilling screws?

Self tapping screws form threads as they're driven but typically need a pilot hole in harder materials. Self drilling screws (also called Tek screws) feature an integrated drill point that both drills and taps simultaneously, eliminating pilot holes entirely.

Can I reuse self tapping screws?

Whilst technically possible, reusing self tapping screws isn't recommended for critical applications. The threads may be damaged during removal, reducing holding strength. For permanent or load-bearing installations, always use new fasteners to ensure maximum reliability and safety.