S-91240A029 1/4"-20 Fed. Spec. FF-N-836, MS35649-2254, 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 with 18-8 Stainless Steel construction for long-lasting performance in harsh environments
- Reliable coarse thread engagement with UNC 1/4"-20 threading for faster assembly and reduced cross-threading risks
- Precise Class 2B thread fit ensuring consistent torque performance and vibration resistance in demanding applications
- Standard external hex drive design for universal compatibility with common wrenches and sockets
- Full compliance with major industrial standards including Fed. Spec. FF-N-836, MS35649-2254, and QQ-P-35 for guaranteed quality
- Environmental regulation compliance with RoHS 3 and REACH standards for safe use in regulated industries
- Optimized dimensions (7/16" width, 3/16" height) providing ideal strength-to-weight ratio for space-constrained assemblies
Professional Applications & Engineering Value
Engineered for industrial applications where corrosion resistance and thread reliability are critical, this 18-8 Stainless Steel UNC hex nut solves common fastener failure points. The coarse thread design (1/4"-20 UNC) maintains secure connections in high-vibration environments while the Class 2B thread fit ensures consistent clamping force without galling. Ideal for machinery, structural assemblies, and equipment exposed to moisture or chemicals, the standard external hex drive profile allows for efficient installation and maintenance across manufacturing, construction, and transportation sectors where heavy-duty hex nuts must withstand cyclic loading and environmental stressors.
Specification Summary & Compliance
This hex nut maintains Class 2B thread fit tolerance per UNC standards with precise 1/4"-20 coarse threading. Manufacturing complies with Fed. Spec. FF-N-836, MS35649-2254, and QQ-P-35 specifications. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant regarding substance restrictions, ensuring environmental regulatory adherence for global industrial applications.
