Detail & Specs
Self-Tapping screws are meant to be installed directly into sheet metal. Tapping Screws require a pilot hole and tap their own threads during install.
They cannot be used with machine thread tapped holes or machine thread nuts.
Unlike flat head countersunk screws, the convex portion of an oval head screw is meant to sit proud of the work surface after installation. The underside of the head has a 90 degree angle.
The length of oval head countersunk screws is measured from the beginning of the undercut of the head (where the raised oval convex meets the 90 degree angle) to the end of the threading.
Stainless tapping screws are commonly used in damp or wet environments for corrosion resistance, popular across a wide range of industries: furniture, automotive, industrial machinery, architectural finish work, agriculture, food processing, clean energy, etc.
For any application involving marine (salt water), use A4 / 316 Stainless Steel material, available as a special order.