S-98498A118 M42 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Superior load distribution with an extra wide 70mm hex profile that minimizes surface pressure and prevents loosening under extreme vibration
• Exceptional tensile strength from ASTM Grade 2H certification, ensuring reliable performance in high-stress industrial applications
• Precision thread engagement with Class 6H fit for smooth installation and consistent clamping force without cross-threading risks
• Enhanced durability through heavy-duty steel construction that resists corrosion and maintains integrity in harsh environments
• Industry-standard compliance with ASTM A194 specifications, guaranteeing material quality and manufacturing consistency
• Quick installation using standard external hex drive tools, reducing assembly time and labor costs
• Environmental responsibility with full REACH and RoHS 3 compliance, meeting global regulatory requirements for hazardous substances

Professional Applications & Engineering Value

This M42 extra wide hex nut delivers critical engineering solutions where standard fasteners fail. The 70mm wide profile provides substantially increased bearing surface, effectively distributing clamp load across wider areas to prevent material deformation in structural steel connections, heavy machinery bases, and industrial equipment frames. Manufactured from high-grade steel with ASTM Grade 2H certification, it maintains consistent preload in high-vibration environments like construction equipment, mining machinery, and transportation systems. The metric coarse thread with 4.5mm pitch offers superior resistance to vibrational loosening while enabling faster installation compared to fine-thread alternatives. With external hex drive compatibility, maintenance teams can utilize standard tools for efficient servicing and repairs, minimizing downtime in industrial operations.

Specification Summary & Compliance

This heavy-duty fastener features M42 metric coarse threads with 4.5mm pitch and Class 6H thread fit per ISO standards, ensuring precise dimensional accuracy and reliable engagement. Manufacturing complies with ASTM A194 material specifications and ASTM Grade 2H strength requirements for consistent performance. The nut is fully compliant with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) directives, containing no restricted hazardous substances. Dimensions include 70mm width across flats and 42mm height, providing optimal proportions for heavy-load applications.