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Metric Class 8.8 Hex Flange Nut Din 6923 Clear Zinc Cr3 Plating

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Metric Class 8.8 Hex Flange Locknuts – DIN 6923 Strength with Built-In Locking

The metric Class 8.8 hex flange locknut manufactured to DIN 6923 with clear zinc Cr3 plating is a high-performance, all-metal fastening solution built for strength, speed, and vibration resistance. Designed with an integrated wide flange, this locknut eliminates the need for a separate washer while evenly distributing clamp load and resisting loosening under torque and vibration.

Engineered for Mechanical and Structural Reliability

Produced from Class 8.8 medium carbon steel, these flange locknuts offer excellent tensile strength, wear resistance, and durability. The DIN 6923 specification ensures precise dimensions, consistent quality, and full compatibility with metric bolt systems—making these locknuts a trusted choice for engineers, OEMs, and maintenance professionals working to international standards.

Built-In Serrated Locking Action

The underside of the flange features serrations that bite into the mating surface, creating a mechanical locking effect that helps prevent back-off from vibration or dynamic loading. This all-metal locking design performs reliably in environments where nylon inserts may fail due to heat, oils, or repeated reuse.

Clear Zinc Cr3 Plating Benefits

Finished with clear zinc Cr3 (trivalent chromium) plating, these locknuts gain added protection against rust and oxidation while maintaining a clean, professional silver appearance. The Cr3 coating is RoHS-compliant, offering an environmentally responsible alternative to hexavalent chromium finishes. It provides dependable corrosion resistance for indoor use and moderately corrosive outdoor environments, including general construction and equipment assemblies.

Key Specifications

Type: Hex flange locknut
Material: Class 8.8 hardened steel
Finish: Clear zinc Cr3, RoHS-compliant
Thread Type: Metric coarse and fine
Sizes: M5 through M24 (larger sizes available)
Standard: DIN 6923
Locking Mechanism: Serrated flange

A Smart Choice for Metric Fastening

Whether you’re assembling machinery, automotive components, or structural frames, the Class 8.8 DIN 6923 hex flange locknut delivers dependable strength, built-in locking, and corrosion resistance. Need sizing guidance or technical details? Reach out today for expert support tailored to your application.