Self-tapping screws countersunk head imprint two hole

Thread and Pitch


Security self-tapping screws with countersunk flat head and two-hole drive are characterized by a thread specifically designed to form its own mating thread in the base material during installation. The thread geometry ensures high holding power and uniform stress distribution, providing a stable and long-lasting fastening.
The point facilitates the start of the screw and ensures proper alignment during installation. They are particularly suitable for applications on thin sheet metal, light metals, and plastic materials. Depending on the thickness and hardness of the substrate, a properly sized pilot hole may be required to optimize holding performance and prevent deformation or excessive stress in the material.
The self-tapping configuration reduces assembly time and eliminates the need for nuts or threaded inserts, making installation simpler and more efficient.

Head Type and Drive


The countersunk flat head is designed to sit flush with the surface once installed, ensuring a clean aesthetic result and minimizing protrusions. This feature makes it ideal for applications where a smooth surface is required or where protruding elements could pose an obstacle or safety risk.
The two-hole security drive (also known as “spanner” or “snake eye”) is specifically designed to prevent removal with standard tools. It requires a dedicated two-pin driver bit, increasing protection against tampering, vandalism, or unauthorized access. This solution is particularly suitable for public environments or equipment requiring enhanced security.