High-Strength Countersunk Screw DIN 7991

The high-strength countersunk head screw is manufactured to the German standard DIN 7991, has an ISO 10642 equivalent, and features a TORX socket. Thread diameter: M3–M24. Screw length: 5–240 mm.

These screws are used where a reliable, high-strength fastened joint is required. The flat head sits flush against the surface and does not protrude, which is important in the manufacture of mechanisms and moving parts of equipment, vehicles, and other machinery.

The fastener is made of high-strength hardened steel (property class 8.8 and 10.9), carbon steel with a coating (dispersion or electroplated zinc coating), non-ferrous metals, stainless steel A2, and austenitic stainless steel A4, which offers improved corrosion resistance and resistance to aggressive environments.

The hex socket improves engagement with the driving tool, facilitates installation, and simplifies tightening and loosening of the fasteners.