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Alloy Thermal Black Oxide Metric 12.9 Flat Socket Cap, Din 7991
Metric flat socket cap screws manufactured to DIN 7991 and rated at Class 12.9 provide extremely high tensile strength and a fully flush‑mount fastening profile for precision assemblies. Made from premium alloy steel and finished with a thermal black oxide coating, these screws deliver exceptional durability, improved wear resistance, and a clean, non‑reflective black appearance suitable for industrial and engineering applications.
Designed with a countersunk flat head and internal hex drive, these screws install level with the surface for a smooth, obstruction‑free finish—ideal for equipment housings, motion systems, machinery frames, robotics, automotive engineering, and any application requiring maximum strength in limited‑clearance environments.
For large scale orders, request a quote to receive our best pricing available for your custom order.
Class 12.9 alloy steel provides the highest strength rating commonly available for metric fasteners, making these flat socket cap screws an excellent choice for demanding mechanical loads, structural fastening, and high‑precision applications. The thermal black oxide finish enhances lubricity during assembly and adds moderate corrosion resistance, while maintaining a uniform, professional appearance.
DIN 7991 compliance ensures consistent head geometry, precise angles, and accurate tolerances for perfect fit in countersunk holes. These screws are widely used in OEM manufacturing, industrial machinery, automotive assemblies, robotics, and applications requiring secure, flush, high‑strength fastening.
Available in a complete range of metric diameters and lengths to meet strict engineering requirements.
