S-91270A310 M4 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated spring steel washer that maintains locking 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
• Precise thread engagement with Class 6H thread fit providing consistent, secure mating with mating components
• Easy installation and removal using standard metric tools with external hex drive design
• Optimized for coarse thread applications with M4 x 0.7mm pitch offering quick assembly and disassembly
• Environmental compliance meeting RoHS 3 standards for safe use across various industries

Professional Applications & Engineering Value

This M4 locknut with spring washer delivers exceptional engineering value by solving critical vibration-induced loosening problems in industrial equipment. The zinc-plated steel construction provides durable corrosion resistance while the integrated spring steel washer creates constant tension that prevents back-off under continuous vibration. The Class 8 strength rating ensures reliable performance in high-stress applications such as machinery, automotive assemblies, and electrical enclosures. The metric external hex design allows for straightforward installation using standard tools, while the coarse thread pitch enables rapid assembly in production environments. This combination of features makes it ideal for vibration-resistant fastening in manufacturing, automation, and heavy equipment applications where reliability is paramount.

Specification Summary & Compliance

This metric hex locknut features precise M4 x 0.7mm coarse threads with Class 6H thread fit tolerance for optimal mating performance. The fastener maintains dimensional accuracy with 7mm width and 4.2mm height specifications, complemented by a 10mm OD spring lock washer. Manufactured to Class 8 strength standards and constructed from zinc-plated steel, this locknut complies with RoHS 3 (2015/863/EU) environmental regulations for industrial applications requiring restricted substance compliance.