S-91270A320 M5 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated spring lock washer design that maintains clamping force under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in harsh environments
• High-strength performance with Class 8 rating ensuring reliable fastening in demanding industrial applications
• Optimized load distribution from 12 mm washer OD that reduces surface pressure and prevents material damage
• Precise thread engagement with Class 6H metric coarse thread (M5 x 0.8 mm) for consistent installation and removal
• Easy installation and maintenance using standard external hex drive compatible with common wrench tools
• Environmental compliance meeting RoHS 3 standards for safe use across regulated industries

Professional Applications & Engineering Value

This Class 8 zinc-plated steel locknut with integrated spring lock washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment. The metric coarse thread (M5 x 0.8 mm) with Class 6H thread fit ensures precise engagement while the external hex drive facilitates quick installation in confined spaces. The spring steel washer creates continuous tension that compensates for thermal expansion and mechanical settling, maintaining joint integrity where conventional nuts would fail. This combination of vibration-resistant locking and corrosion protection makes it ideal for applications subject to dynamic loads, temperature variations, and exposure to industrial environments.

Specification Summary & Compliance

This locknut features M5 x 0.8 mm coarse metric threads with Class 6H thread fit tolerance, ensuring precise dimensional accuracy according to ISO standards. The external hex design measures 8 mm across flats with 5.3 mm height, providing optimal wrench engagement. Manufactured from zinc-plated steel with Class 8 strength rating, the fastener includes a spring lock washer (12 mm OD) for enhanced locking performance. The product is fully RoHS 3 (2015/863/EU) compliant and meets international metric fastener specifications for industrial applications.