DIN 7983 Cross Flush (Star) Raised Countersunk (Oval) Head Screws - ISO 7051 Cross Countersunk Raised Countersunk (Oval) Head Tap Screws

Cross-flush raised countersunk head (oval) lead screws defined in the DIN 7983 standard published by the German Institute for Standardization (DIN) are designed to thread pre-drilled untapped holes of the substrate into which they are screwed. Recommended pilot hole sizes vary depending on the diameter of the screw to be used and the thickness of the backing material. These screws are manufactured from zinc plated steel and stainless steel. Such cross-recessed raised countersunk (oval) tapping screws are fully threaded with a coarse thread and a knuckle point. It is recommended to be used in thin sheet metal, resin plywood and composite materials. Flat countersunk heads have a flat top surface and a cone-shaped bearing surface with a head angle of approximately 90 degrees. It is used for applications where the head must be flush with the mating surface of the substrate.

Similarly, the ISO 7051 standard, published by the International Organization for Standardization (ISO), describes the characteristics of products with thread sizes from ST 2,2 to ST 9,5 (ISO 7051 Cross-recessed countersunk (oval) tap screws). This standard also includes specifications relating to international standards.

In the DIN 7983 standard, the requirements for cross countersunk (star) raised countersunk head (oval) screws are listed under the following headings:

• Mechanical properties of stainless steel for cross countersunk (star) raised countersunk (oval) screws
• Chemical composition of stainless steel for cross countersunk (star) raised countersunk (oval) screws
• Mechanical properties of steel for cross countersunk (star) raised countersunk (oval) screws
• Chemical composition of steel for cross countersunk (star) raised countersunk (oval) screws

Among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, our organization, with its trained and expert staff and advanced technological equipment, within the scope of DIN 7983 standard, for cross-recessed (star) raised countersunk head (oval) screws and ISO 7051. Within the scope of the standard, it also provides testing services for cross-recessed raised countersunk head (oval) lead screws.