S-91240A030 5/16"-18 Fed. Spec. FF-N-836, MS35649-2314, Fed. Spec. QQ-P-35 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 thanks to 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Reliable, vibration-resistant fastening with Class 2B thread fit ensuring secure connections in high-stress applications
- Wide industry acceptance through compliance with Fed. Spec. FF-N-836, MS35649-2314, and QQ-P-35 standards
- Easy installation and removal with standard external hex drive design compatible with common tools
- Durable coarse UNC threading (5/16"-18) that resists cross-threading and provides strong holding power
- Environmental compliance assurance with RoHS 3 and REACH regulations for global supply chain integration
- Optimized dimensions (9/16" width, 7/32" height) for balanced strength-to-weight ratio in space-constrained assemblies
Professional Applications & Engineering Value
This 5/16"-18 UNC hex nut delivers exceptional performance in demanding industrial settings where corrosion resistance and thread reliability are critical. The 18-8 Stainless Steel composition provides inherent protection against rust and chemical degradation, making it suitable for marine, chemical processing, and outdoor applications. The Class 2B thread fit offers optimal clearance for rapid assembly while maintaining vibration resistance, significantly reducing installation time in production environments. With its coarse thread design and standard external hex drive, this nut prevents galling during tightening and accommodates high torque applications. Engineers specify this component for machinery, structural frameworks, and equipment requiring long-term fastening integrity under variable load conditions.
Specification Summary & Compliance
This inch system hex nut features precise Class 2B thread fit tolerances with 5/16"-18 UNC coarse threading and right-hand thread direction. Manufacturing complies with Fed. Spec. FF-N-836, MS35649-2314, and QQ-P-35 standards, ensuring consistent quality and dimensional accuracy. The component is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (including 224 SVHCs as of 06/10/2022), meeting international environmental regulations for industrial components.
