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Countersunk Head

Countersunk Head

Countersunk Head

Security Countersunk Self Tapping Screws

Countersunk security self tappers cut their own thread into sheet metal, plastic or timber and finish flush with the surface, with a tamper-resistant drive so they cannot be removed with a standard screwdriver. Common on metal cabinets, covers and public fittings.

Drive and Size Range

Tamper-resistant drives including Pin Torx, Pin Hex, Tri-Wing and Spanner / Two-Hole. Gauge sizes across the common self-tapper range in zinc-plated and stainless. The matching driver bits are stocked in Security Bits.

Recommended Use

Use a countersunk head where the screw must finish flush in a pre-drilled or self-piloting hole. Match the gauge to the material thickness and the bit to the drive. For harder substrates, drill a pilot hole to the recommended size to avoid head shear.

Browse the full Security Self Tappers range, the wider Security Fasteners category, or see our Technical PDFs library for spec sheets.

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