S-91270A280 M5 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated spring washer technology that maintains clamping force under dynamic loads
• Enhanced corrosion protection with black-oxide steel construction for extended service life in harsh environments
• High-strength performance with Class 8 rating ensuring reliable fastening in demanding industrial applications
• Precise thread engagement with Class 6H metric coarse threads providing consistent, secure mating with mating components
• Easy installation and removal using standard external hex drive for efficient maintenance and assembly operations
• Regulatory compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use
• Optimized locking performance combining spring washer action with right-hand thread design for secure fastening

Professional Applications & Engineering Value

This Class 8 M5 locknut with integrated spring washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment. The black-oxide steel construction provides essential corrosion resistance while maintaining the mechanical properties required for high-stress applications. The metric coarse threading (M5 x 0.8 mm) ensures rapid assembly and disassembly while the Class 6H thread fit guarantees precise engagement with mating components. The spring washer's 12mm outer diameter creates optimal load distribution, making this hex locknut ideal for applications where constant vibration would compromise standard fasteners, thereby reducing maintenance frequency and improving operational reliability.

Specification Summary & Compliance

This metric locknut features M5 x 0.8 mm coarse threads with Class 6H thread fit tolerance, ensuring precise dimensional accuracy according to metric standards. The external hex drive (8mm width) and 5.3mm height provide standard tool engagement. Manufactured from Class 8 steel with black-oxide surface treatment, the nut is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, meeting international environmental and safety standards for industrial components.