S-91247A335 7/16"-20 x 5 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
- Superior load-bearing capacity with Grade 5 steel construction and 120,000 psi tensile strength for reliable performance in high-stress applications
- Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
- Precise thread engagement with Class 2A fit and UNF fine threading for secure fastening and vibration resistance
- Optimized torque transmission thanks to the external hex drive and 5/8" head width for easy installation with standard tools
- Versatile partial threading design allowing for both clamping and alignment functions in assembly operations
- Consistent hardness performance with Rockwell C25 rating ensuring durability and resistance to wear
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality and safety
Professional Applications & Engineering Value
This Grade 5 steel hex head screw delivers exceptional engineering value through its robust material properties and precision manufacturing. The 7/16"-20 UNF fine threading provides superior resistance to loosening under vibration, making it ideal for machinery, automotive assemblies, and structural applications where dynamic loads are present. The zinc plating offers reliable corrosion protection in industrial environments, while the partially threaded design allows for both secure clamping and precise component alignment. With its external hex drive and substantial head dimensions, installation is straightforward using standard wrenches, reducing assembly time and labor costs. These hex head screws are engineered to maintain integrity under continuous stress, solving common fastening failures in heavy-duty applications.
Specification Summary & Compliance
This fastener features precision Class 2A thread fit with 7/16"-20 UNF fine threading and right-hand thread direction. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
