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Metric 12.9 Flat Socket Cap, Din 7991, Zinc Bake Cr+3, Alloy
Metric flat socket cap screws manufactured to DIN 7991 and rated at Class 12.9 provide extremely high tensile strength and a fully flush countersunk profile for demanding engineering applications. Constructed from premium alloy steel and finished with a Zinc Bake Cr+3 coating, these screws combine exceptional mechanical performance with enhanced corrosion resistance and a clean, bright metallic appearance.
The Zinc Bake Cr+3 finish offers uniform plating, improved protection against oxidation, and a RoHS‑compliant trivalent chromium layer that is more environmentally friendly than traditional hexavalent coatings. Designed with an internal hex drive and countersunk flat head, these screws sit flush with the material surface—ideal for assemblies with limited clearance, moving parts, or applications where aesthetics and safety are priorities.
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Class 12.9 alloy steel provides one of the highest strength ratings available for metric fasteners, making these DIN 7991 flat socket cap screws suitable for heavy‑load, high‑precision, and high‑vibration environments. The Zinc Bake Cr+3 coating delivers reliable corrosion resistance while maintaining a smooth, consistent finish that stands up to handling and installation.
DIN 7991 compliance ensures accurate head dimensions, precise countersinking, and consistent thread tolerance for optimal fit in precision-engineered components. These screws are widely used in machinery, robotics, automotive assemblies, structural applications, OEM manufacturing, and installations requiring both high strength and a flush‑mount profile.
Available in a full range of metric diameters and lengths to meet strict industrial and engineering specifications.
