S-91247A589 5/16"-18 x 1 3/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced load-bearing capacity with 120,000 psi tensile strength, ideal for high-stress industrial assemblies
- Superior corrosion resistance through zinc plating, extending service life in harsh environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit for rapid installation and vibration resistance
- Reliable mechanical performance backed by Grade 5 certification and Rockwell C25 hardness
- Secure torque transmission via external hex drive design, compatible with standard wrenching tools
- Versatile partial threading allowing precise clamp load distribution across joint interfaces
- Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 specifications for quality consistency
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws deliver exceptional reliability in structural assemblies, machinery frames, and equipment manufacturing. The zinc plated steel construction provides essential corrosion protection for outdoor or humid environments, while the coarse UNC threading maintains secure fastening under dynamic loads and vibrations. With partial threading optimizing stress distribution, these fasteners prevent joint loosening in high-vibration settings. The external hex drive enables efficient installation with common tools, reducing assembly time in production lines. These industrial hex screws solve critical challenges in automotive, construction, and manufacturing sectors where 120,000 psi tensile strength and consistent performance are paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 5/16-18 UNC coarse threading and 1-3/4" length. Complies with ASME B18.2.1 and SAE J429 Grade 5 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring safe usage across regulated industries.
