S-91270A340 M8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated spring lock washer that maintains clamping force under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• High-strength performance with Class 8 rating ensuring reliable performance in demanding industrial applications
• Quick installation efficiency with standard 13mm external hex profile and coarse 1.25mm pitch threads
• Precise thread engagement with Class 6H thread fit providing consistent, secure fastening connections
• Regulatory compliance assurance meeting RoHS 3 standards for safe use across various industries
• Durable steel construction with 18mm OD spring washer offering repeated use capability without performance degradation

Professional Applications & Engineering Value

This M8 locknut with integrated spring washer delivers exceptional engineering value in applications where vibration-induced loosening poses significant safety and maintenance challenges. The zinc-plated steel construction provides essential corrosion resistance for outdoor equipment, automotive assemblies, and industrial machinery exposed to environmental elements. The metric coarse thread with 1.25mm pitch ensures rapid installation while maintaining secure fastening, particularly valuable in high-volume production environments. The combination of Class 8 strength rating and spring lock washer technology addresses critical vibration management needs in heavy machinery, conveyor systems, and power transmission equipment, reducing maintenance frequency and preventing costly downtime from fastener failure.

Specification Summary & Compliance

This external hex locknut features M8 x 1.25mm metric coarse threads with Class 6H thread fit tolerance, ensuring precise dimensional accuracy according to international standards. The fastener maintains 13mm width across flats and 8.8mm height for consistent installation tool compatibility. Manufactured from high-grade steel with zinc plating surface treatment, the product is RoHS 3 (2015/863/EU) compliant and meets industrial safety requirements. The integrated spring lock washer with 18mm outer diameter provides reliable locking performance while maintaining compliance with industrial fastener specifications for vibration-resistant applications.