#8 Phil Flat Head Self Drilling Screw Zinc Plated

Self-drilling screws have a drill bit-like tip that allows them to drill their own pilot hole as they’re driven into the material, typically used in metal applications.Since they can create their own pilot hole, they save time and are efficient for work with harder materials like metal. Flat head screws are used when a flush, smooth finish is needed.

#8 indicates the gauge or diameter of the screw, which is about 0.164 inches (4.17 mm).