S-91028A715 M20 JIS B 1181 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Precision Class 6H thread fit for secure, vibration-resistant connections that maintain integrity under heavy loads
• JIS B 1181 compliance guarantees consistent quality and interchangeability in metric fastener systems
• Coarse 2.5 mm pitch threading enables faster assembly and reduced cross-threading risks in industrial applications
• Standard external hex drive design allows for high-torque installation using common wrench tools
• RoHS 3 environmental compliance meets strict regulatory standards for hazardous substance restrictions
• Heavy-duty 27mm width and 12mm height profile provides optimal bearing surface for distributed load pressure

Professional Applications & Engineering Value

This M20 hex nut delivers critical performance advantages where corrosion resistance and thread reliability are paramount. The 18-8 stainless steel material prevents rust formation in chemical processing, marine, and outdoor installations, while the Class 6H thread tolerance maintains clamping force despite vibration and thermal cycling. Engineered to JIS B 1181 standards, this metric hex nut ensures dimensional consistency across Japanese industrial equipment, automotive assemblies, and machinery requiring coarse thread fastening solutions. The external hex drive accommodates high-torque applications where socket access is available, making it ideal for structural connections, heavy equipment maintenance, and manufacturing fixtures demanding repeatable disassembly capability.

Specification Summary & Compliance

This M20 x 2.5 mm hex nut features Metric coarse threading with Class 6H thread fit per JIS B 1181 specifications, ensuring precise dimensional accuracy. The nut maintains 27mm width across flats and 12mm height for standard wrench engagement. Manufacturing complies with JIS B 1181 standards for hexagonal nuts, and the product is RoHS 3 (2015/863/EU) Compliant, meeting environmental regulations for hazardous substance restrictions in electronic and industrial applications.