S-91247A648 3/8"-16 x 6" 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 for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating that protects against rust and extends service life
- Optimized thread engagement with UNC coarse threads and Class 2A fit for faster assembly and vibration resistance
- Enhanced torque transmission through external hex drive design that prevents tool slippage during installation
- Controlled thread placement with partial threading that provides precise fastening in specific connection points
- Consistent hardness performance with Rockwell C25 rating that maintains structural integrity under stress
- Industry-standard compatibility meeting ASME B18.2.1 and SAE J429 specifications for reliable interchangeability
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver critical engineering solutions for industrial assembly challenges where vibration resistance and structural integrity are paramount. The zinc plated steel construction provides essential corrosion protection in manufacturing environments, while the 3/8"-16 UNC coarse thread configuration ensures rapid installation and secure fastening in machinery, structural frameworks, and heavy equipment. The partial threading design allows for precise clamping force distribution, making these external hex drive fasteners ideal for applications requiring specific grip lengths. With 120,000 psi tensile strength and controlled hardness, these screws maintain joint integrity under dynamic loads and thermal cycling, solving common failure points in industrial fastening systems.
Specification Summary & Compliance
This 6" hex head screw features precise Class 2A thread fit tolerances with 3/8"-16 UNC coarse thread specifications manufactured to ASME B18.2.1 and SAE J429 Grade 5 standards. The fastener maintains full compliance with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations, ensuring suitability for global industrial applications while meeting rigorous quality and safety requirements.
