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Metric Class 8.8 Hex Serrated Flange Bolt, DIN 6921, Zinc-Yellow CR+6
Our Metric Class 8.8 Hex Serrated Flange Bolts manufactured to DIN 6921 with Zinc‑Yellow CR+6 finish are engineered for strong, vibration‑resistant fastening in automotive, industrial, and mechanical applications. Made from medium‑carbon steel and heat‑treated to Class 8.8 strength requirements, these bolts provide a reliable balance of tensile strength, toughness, and durability for general‑purpose and structural assemblies.
The serrated flange functions as an integrated locking washer, gripping the mating surface to help prevent loosening caused by vibration or dynamic loading while evenly distributing clamp force. This design eliminates the need for a separate washer, improving assembly efficiency and joint reliability. The Zinc‑Yellow CR+6 plating delivers enhanced corrosion resistance along with a distinctive yellow finish, suitable for indoor and light‑to‑moderate outdoor environments.
Designed for dependable performance, DIN 6921 Class 8.8 Serrated Hex Flange Bolts with Zinc‑Yellow CR+6 are commonly used in machinery, automotive assemblies, equipment manufacturing, enclosures, and maintenance applications. The serrated flange improves joint security, while the hex head allows easy installation with standard tools. The CR+6 zinc coating provides added corrosion protection and extended service life without compromising thread accuracy. Available in a wide range of metric diameters and lengths, these bolts deliver consistent quality for OEM, repair, and industrial use.
