S-91028A658 M5 JIS B 1181 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance provided by 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Precise Class 6H thread fit guarantees secure fastening and vibration resistance in demanding applications
• JIS B 1181 standard compliance ensures consistent quality and interchangeability in metric fastener systems
• Coarse thread design enables quick assembly and reduced cross-threading risks in industrial settings
• External hex drive configuration allows for high torque application with standard tools
• RoHS 3 compliance meets environmental regulations for use in sensitive applications
• Optimized 8mm width and 4mm height provides ideal balance between strength and space efficiency

Professional Applications & Engineering Value

This M5 hex nut with 0.8mm coarse thread pitch delivers exceptional engineering value across multiple industrial sectors. The 18-8 stainless steel composition provides outstanding corrosion resistance, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The Class 6H thread fit ensures precise engagement with mating components, preventing loosening under vibration while maintaining consistent clamping force. Manufacturing compliance with JIS B 1181 standards guarantees dimensional accuracy and mechanical properties required for automotive assemblies, machinery construction, and electrical enclosures. The external hex drive style facilitates efficient installation and removal using common wrenching tools, reducing assembly time and labor costs in production environments.

Specification Summary & Compliance

This metric hex nut features M5 thread size with 0.8mm coarse pitch and Class 6H thread fit per JIS B 1181 specifications. The standard external hex profile measures 8mm across flats with 4mm height. Manufacturing follows JIS B 1181 standards for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) compliant, meeting environmental regulations for restricted substances. Thread direction is right-hand with metric coarse threading suitable for general industrial applications.