S-91947A130 5/16"-18 ASME B18.2.2 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
- Lightweight strength with 6061 aluminum construction for reduced assembly weight without compromising durability
- Space-saving thin profile (3/16" height) ideal for applications with limited clearance while maintaining full functionality
- Reliable coarse thread engagement with UNC 5/16"-18 threads providing faster assembly and reduced cross-threading risk
- Precision thread fit with Class 2B specification ensuring consistent performance and vibration resistance
- Standard compliance assurance meeting ASME B18.2.2 for guaranteed dimensional accuracy and interchangeability
- Superior corrosion resistance from aluminum material properties, extending service life in demanding environments
- Environmental compliance with REACH and RoHS 3 standards for safe use across regulated industries
Professional Applications & Engineering Value
This thin hex nut addresses critical engineering challenges in weight-sensitive and space-constrained applications. The 6061 aluminum construction provides an optimal balance of strength-to-weight ratio, making it ideal for aerospace components, electronic enclosures, and transportation equipment where every ounce matters. The UNC coarse thread design ensures rapid installation and superior resistance to vibration loosening, while the external hex drive offers excellent torque transmission for secure fastening. The thin profile enables use in compact assemblies where standard nuts would be impractical, without sacrificing the reliability needed for industrial applications. Combined with inherent corrosion resistance, this nut delivers long-term performance in challenging environments while maintaining compliance with industry standards.
Specification Summary & Compliance
This hex nut features precise Class 2B thread fit with 5/16"-18 UNC coarse threads and right-hand thread direction. Manufacturing complies with ASME B18.2.2 specifications, ensuring dimensional accuracy with 1/2" width and 3/16" height. The product is REACH (EC 1907/2006) compliant and meets RoHS 3 (2015/863/EU) standards with exemption 6(b)-II for lead as an alloying element in aluminum machining applications.
