Wing Design on Self-Drilling Screws: The Solution for Preventing Material Cracking & Supporting a Perfect Flush Finish

In the construction and finishing industry, Self-Drilling Screws are among the most widely used fastening solutions because they can drill and fasten in a single operation.

However, when installing materials such as Cemboard, engineered wood, natural wood, or polycarbonate sheets, choosing the right Self-Drilling Screws not only determines the strength of the fastening connection but also directly affects the quality of the finished surface.

One of the most remarkable innovations in modern Self-Drilling Screws is the wing design on the screw shank.

Although small in size, this feature plays a very important role in:

• Preventing material cracking.
• Supporting a flush screw finish.
• Improving the durability of the completed installation.

1. The Wings Are Positioned Directly Above the Drill Point and Operate as Follows

Unlike conventional Self-Drilling Screws, this type is designed with two small wings positioned directly above the drill point.

When drilling through soft materials (wood, Cemboard, or plastic):

• The wings enlarge the drilled hole to a diameter larger than the screw threads.

*When the screw reaches the steel substrate:

• The wings automatically break off.
• The drill point is then able to penetrate the steel section.

As a result:

• The upper material is relieved of stress.
• The lower steel substrate remains securely fastened.

With this operating mechanism, Self-Drilling Screws with wing design effectively process the upper material while ensuring a strong fastening connection to the steel structure below.