S-91247A848 3/4"-10 x 3 1/4" 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
- Superior load-bearing capacity with 120,000 psi tensile strength for demanding industrial applications
- Enhanced corrosion resistance through zinc plating, extending service life in harsh environments
- Reliable fastening performance with Grade 5 strength classification and Rockwell C25 hardness
- Quick installation and removal using standard external hex drive and 1 1/8" head width
- Optimized thread engagement with UNC coarse threading and Class 2A fit for secure connections
- Versatile partial threading allowing for both clamping and alignment functions
- Comprehensive regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers exceptional engineering value for heavy-duty industrial applications where reliability is paramount. The zinc plated steel construction provides critical corrosion protection in manufacturing facilities, construction sites, and machinery assembly environments. The 3/4"-10 UNC coarse thread design ensures rapid installation and superior resistance to vibration loosening, while the partial threading allows for precise clamping force distribution. With 120,000 psi tensile strength and Rockwell C25 hardness, this external hex drive fastener maintains structural integrity under extreme loads, making it ideal for structural steel connections, heavy equipment assembly, and industrial machinery where failure is not an option.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 3/4"-10 UNC coarse thread specifications and 1 3/4" minimum thread length. Manufactured to ASME B18.2.1 and SAE J429 Grade 5 standards, ensuring dimensional accuracy and mechanical performance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring certified components.
