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Metric Class 8.8 Hex Flange Bolt, Serrated, DIN 6921, Zinc CR+3
Our Metric Class 8.8 Serrated Hex Flange Bolts manufactured to DIN 6921 with Zinc CR+3 plating are designed for secure, vibration‑resistant fastening in automotive, industrial, and mechanical applications. Made from quality medium‑carbon steel and heat‑treated to Class 8.8 strength requirements, these bolts provide a dependable balance of tensile strength, ductility, and durability for general‑purpose and structural assemblies.
The serrated flange is engineered to grip the mating surface, helping prevent loosening caused by vibration or dynamic loading while evenly distributing clamp force. This integrated locking feature eliminates the need for a separate washer, simplifying installation and improving joint reliability. The Zinc CR+3 finish enhances corrosion resistance and provides a clean, bright appearance suitable for indoor and light‑to‑moderate outdoor service.
Built for efficiency and long‑term performance, DIN 6921 Class 8.8 Serrated Hex Flange Bolts are commonly used in machinery, equipment manufacturing, automotive assemblies, enclosures, and maintenance applications. The flange design improves load distribution and joint stability, while the trivalent zinc coating protects against corrosion without compromising thread accuracy. Available in a wide range of metric diameters and lengths, these bolts deliver consistent quality and dependable fastening for OEM, repair, and industrial use.
