S-90670A222 5-40 ASME B18.6.3 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 6061 aluminum construction, ideal for harsh industrial environments
- Precise thread engagement with Class 2B thread fit ensuring reliable, vibration-resistant connections
- Standardized compatibility through ASME B18.6.3 compliance for seamless integration with existing assemblies
- Enhanced durability with coarse UNC threads providing excellent wear resistance and reusability
- Optimized torque transmission via external hex drive design for secure installation with standard tools
- Environmental compliance meeting REACH and RoHS 3 standards for safe, sustainable manufacturing
- Lightweight strength combining 6061 aluminum's mechanical properties with right-hand threading for efficient fastening
Professional Applications & Engineering Value
This 5-40 UNC coarse thread hex nut delivers critical performance advantages for industrial assembly applications where corrosion resistance and weight reduction are paramount. The 6061 aluminum construction provides excellent strength-to-weight ratio while resisting environmental degradation, making it ideal for aerospace, automotive, and electronic enclosures. The coarse thread design ensures rapid installation and superior resistance to vibration loosening, while the standard external hex drive accommodates common wrenching tools for efficient maintenance operations. Engineered to ASME B18.6.3 specifications, this hex nut maintains dimensional consistency across production batches, reducing assembly time and ensuring reliable performance in demanding applications where precision fastening is critical.
Specification Summary & Compliance
This hex nut features 5-40 UNC coarse threads with Class 2B thread fit tolerance for precise engagement. Dimensions include 5/16" width and 7/64" height per standard profile specifications. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and performance. The product is REACH (EC 1907/2006) compliant and meets RoHS 3 (2015/863/EU) requirements with exemption 6(b)-II for lead as an alloying element in aluminum machining applications.
