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  • Nylon Insert Class 8.8 Metric Locknut

Metric Class 8.8 Nylon Insert Locknuts Clear Zinc Cr3 Plating

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Metric Class 8.8 Nylon Insert Locknuts – Clear Zinc Cr3 Plated: Strong, Vibration-Resistant Fastening with Corrosion Protection

When it comes to secure, vibration-resistant fastening in metric applications, Metric Class 8.8 nylon insert locknuts with Clear Zinc Cr3 plating strike the perfect balance between strength, durability, and corrosion resistance. These locknuts are engineered from medium-carbon steel, heat-treated to meet Class 8.8 strength standards, making them ideal for mechanical assemblies, automotive components, industrial equipment, and general construction where metric threads are used.

The defining feature is the nylon insert embedded in the crown of the nut. As the nut is threaded onto a bolt or stud, the nylon collar deforms around the threads, creating prevailing torque that resists loosening caused by vibration, shock, or thermal cycling. This makes these locknuts a go-to solution for dynamic environments, especially when reusability and clean installation are required.

The Clear Zinc Cr3 finish enhances the nut's corrosion resistance without sacrificing appearance or compliance. Unlike older hexavalent coatings, trivalent chromium (Cr3) is RoHS-compliant, offering a clean, silver finish and environmental safety. It protects against rust in indoor and moderately exposed environments, making it suitable for manufacturing, machinery, and light infrastructure.

Specifications & Features:

  • Material: Medium-carbon steel, Class 8.8

  • Type: Nylon insert locknut (prevailing torque)

  • Finish: Clear Zinc Cr3 (trivalent chrome, RoHS compliant)

  • Thread Type: Metric coarse and fine threads

  • Sizes Available: Typically M5 through M30

  • Standards: DIN 985, ISO 10511, EN 24032

For applications where secure fastening, corrosion resistance, and compliance with modern standards matter, Metric Class 8.8 nylon insert locknuts with Clear Zinc Cr3 plating deliver outstanding value.

Need help choosing the right metric size? Contact our fastener experts today!