Introduce

Countersunk Self Drilling Screw enable drilling without first creating a pilot hole. These screws are usually used to join materials like sheet metal. It offers the highest strength compared to other metals and elements, but is the least corrosion resistant. Also known as Carbon Steel.

Flat Head Screws, also called Countersunk Screws, are conical with a flat outer face and a tapering inner face. One advantage of this type of screw is that almost no head protrudes to the surface, so the head can be sunk into the material.So these screws are usually made of stainless steel or zinc coating.

Dimension Drawing

Countersunk Self Drilling Screw

The difference between self-tapping screws and self-drilling screws

• The most important difference between self-tapping and self-drilling screws is that self-tapping screws cannot go through metal without a pilot hole, which must be pre-drilled or pre-punched.
• Unlike self-tapping screws, self-drilling screws need no pilot hole to cut and fasten; they can drill, tap, and fasten in one go, which saves you the extra step of drilling, then fastening.
• etween these two, however, self-drilling screws offer two distinct advantages: time and costs saved at assembly time, and reduced error in installation, which often happens if one pre-drills holes in the wrong size.

Application

• Securing gutter systems
• Shed, warehouse and carport construction
• Garage door fastenings
• Metal roofing installation
• Electrical projects