S-91247A821 5/8"-11 x 7 1/2" 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 capability with 120,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc plating protection, extending service life in demanding environments
- Optimized torque transmission via external hex drive design for secure installation and removal
- Enhanced thread engagement with Class 2A thread fit ensuring precise assembly and vibration resistance
- Reduced cross-threading risk through UNC coarse threading for faster installation in industrial settings
- Controlled partial threading providing unthreaded shank section for improved shear strength
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interoperability
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws deliver critical performance where structural integrity matters most. The zinc plated steel construction provides essential corrosion protection for machinery, structural steel connections, and equipment assembly in manufacturing environments. The 5/8"-11 UNC coarse thread configuration ensures rapid installation while maintaining secure fastening in vibration-prone applications. With partial threading and external hex drive, these screws offer superior clamp load distribution and reliable torque application, making them ideal for construction equipment, industrial machinery, and transportation applications requiring high-strength fasteners that withstand extreme operational stresses.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading standards. 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. Features Rockwell C25 hardness and 120,000 psi tensile strength as per Grade 5 requirements, ensuring consistent performance across industrial applications.
