Hex socket countersunk screw according to ISO 10642 / DIN 7991 in steel grade 10.9 with zinc-plated (ZN) finish. The high-strength material makes it suitable for mechanically demanding assemblies where a low-profile fit is required. The countersunk head provides a flush installation, and the zinc coating offers basic corrosion protection for indoor use. Used in machinery, steel structures and equipment where strength and compact design are important. During electroplating of 10.9 grade fasteners, there is a potential risk of hydrogen embrittlement. Available in multiple sizes from SWEBOLT & BOTNIA BOLT.