S-91247A868 3/4"-10 x 9" 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 threading that provides faster assembly and better performance in softer materials
- Precise mechanical properties with Rockwell C25 hardness ensuring consistent performance and durability
- Secure fastening capability through Class 2A thread fit that maintains proper clearances for reliable installation
- Enhanced torque transmission with external hex drive design that allows for high tightening forces
- Versatile partial threading that combines strong clamping force with unthreaded shank strength
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers exceptional engineering value for heavy-duty industrial applications where reliability is paramount. The combination of steel construction and zinc plating addresses critical corrosion concerns in harsh environments while maintaining structural integrity. The coarse UNC threading (3/4"-10) provides superior performance in soft materials and allows for quicker installation compared to fine threads. With partial threading and a substantial 9" length, this fastener offers optimal stress distribution and clamping force for structural connections, machinery assembly, and construction applications. The external hex drive ensures maximum torque application without stripping, making it ideal for high-vibration environments where secure fastening is essential.
Specification Summary & Compliance
This 3/4"-10 hex head screw features precise Class 2A thread fit tolerances and complies with ASME B18.2.1 specifications where identified with SAE J429. The fastener meets Grade 5 strength classification requirements with verified mechanical properties including 120,000 psi tensile strength and Rockwell C25 hardness. Manufacturing and material compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring regulatory compliance for industrial and commercial applications worldwide.
