S-91268A796 9/16"-12 x 4 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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
- Maximum Load Capacity - 150,000 psi tensile strength ensures reliable performance in the most demanding heavy-duty applications
- Superior Durability - Rockwell C33 hardness provides exceptional resistance to wear and deformation under extreme conditions
- Optimized Thread Engagement - 9/16"-12 UNC coarse threads with Class 2A fit deliver secure fastening and vibration resistance
- Enhanced Installation Efficiency - External hex drive design allows for high-torque application with standard tools
- Precision Engineering - Partially threaded configuration provides optimal clamping force distribution
- Industry Compliance - Meets ASME B18.2.1 and SAE J429 specifications for guaranteed quality and performance
- Environmental Responsibility - RoHS 3 and REACH compliant for sustainable industrial applications
Professional Applications & Engineering Value
These Grade 8 hex head screws are engineered to solve critical fastening challenges in heavy machinery, structural steel connections, and industrial equipment assembly. The 9/16"-12 UNC coarse thread configuration combined with 150,000 psi tensile strength provides exceptional resistance to vibration loosening and mechanical stress. The partially threaded design ensures maximum clamping force where needed while the external hex drive facilitates quick installation with standard industrial tools. Manufactured from high-grade steel with Rockwell C33 hardness, these fasteners maintain integrity under extreme loads, making them ideal for construction, manufacturing, and heavy equipment applications where failure is not an option.
Specification Summary & Compliance
This Grade 8 hex head screw features precise Class 2A thread fit with 9/16"-12 UNC coarse threading and 4 1/2" length. Manufactured to exacting ASME B18.2.1 and SAE J429 standards, ensuring dimensional accuracy and performance reliability. 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 strict regulatory adherence.
