S-91247A924 1"-8 x 5" 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
- Exceptional load-bearing capacity with 120,000 psi tensile strength, ideal for heavy-duty structural connections
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Reliable mechanical performance ensured by Grade 5 classification and Rockwell C25 hardness
- Optimized assembly efficiency with coarse UNC threading and Class 2A fit for faster installation
- Secure torque transmission via external hex drive design compatible with standard wrenching tools
- Versatile partial threading allowing both clamped joint security and adjustable positioning
- Full regulatory compliance meeting ASME B18.2.1, RoHS 3, and REACH standards for global sourcing
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this Grade 5 hex head screw combines high-strength steel construction with zinc plating to address critical challenges in machinery assembly, structural framing, and heavy equipment manufacturing. The 1"-8 UNC coarse thread configuration maintains grip strength in vibrating environments while reducing cross-threading risks during high-volume assembly. Partially threaded design provides unthreaded shank sections for precise shear plane control, making these external hex drive fasteners ideal for bolted connections requiring both clamping force and alignment accuracy. With 5" length and Class 2A thread fit, these screws deliver consistent performance in construction, automotive, and industrial maintenance applications where corrosion resistance and 120,000 psi tensile strength are paramount.
Specification Summary & Compliance
This hex head screw maintains Class 2A thread fit tolerances per UNC standards with precise 1"-8 coarse threading and 2 1/4" minimum thread length. Manufacturing conforms to ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance control.
