They are metric cross countersunk (Phillips) raised countersunk head (oval) head machine screws defined in the DIN 966 standard published by the German Standardization Institute (DIN). Metric machine screws are designed for metal-to-metal applications that require a pre-drilled hole and a matching metric nut or screw to screw in. These screws are usually fully threaded with machine threads and a blind spot. Recommended pre-drilled hole sizes vary depending on the diameter of the screw to be used, but should be slightly larger in diameter than the main (maximum) thread diameter. These screws are manufactured from zinc plated steel and stainless steel. Metric raised countersunk (oval) heads are countersunk heads with a round domed top surface and a cone-shaped bearing surface with a head angle of approximately 80 degrees. It is preferred over standard flat countersunk heads in applications where a more decorative finish is desired. Metric cross recessed (Phillips) raised countersunk (oval) head machine screws are manufactured in zinc plated steel and stainless steel in diameters from M1,6 to M10 up to 38 mm long.
-urun-sinifi-a.jpg "DIN 966 Oval Head Phillips Machine Screws - ISO 7047 H Type or Z Type Cross Recessed Raised Countersunk Screws (Common Head Style) - Product Class A")
Similarly, the ISO 7047 standard published by the International Organization for Standardization (ISO) describes the specifications for Class A countersunk screws with threads from M1,6 to M10 and with H-type or Z-type cross recesses (ISO 7047 H-type or Z-type cross recessed countersunk screws (common head style) - Product class A). In special cases, if specifications other than those listed in this standard are required, international standards such as ISO 261, ISO 888, ISO 898-1, ISO 965-2, and ISO 3506-1 should be followed. For hexagonal high nuts (style 2), the ISO 4033 standard should be followed.
Our organization, among the numerous tests, measurements, analyses, and evaluations it provides for businesses in various sectors, also offers testing services for oval-headed Phillips machine screws under the DIN 966 standard and for H-type or Z-type cross-recessed countersunk screws (common head style) (product class A) under the ISO 7047 standard, thanks to its trained and expert staff and advanced technological equipment.
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