S-92620A747 1/2"-20 x 1 3/4" 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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc yellow-chromate plating in harsh industrial environments
- Precise thread engagement with Class 2A UNF fine threads for vibration resistance and secure fastening
- Maximum driving torque capability via external hex head design for easy installation with standard tools
- Enhanced durability from Rockwell C33 hardness Grade 8 steel construction
- Full-length threading for consistent clamping force distribution across the entire fastener
- Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 standards for quality and safety
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in demanding industrial applications where failure is not an option. The 1/2"-20 UNF fine thread pattern provides superior resistance to vibrational loosening in machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating creates a protective barrier against corrosion in outdoor or chemically aggressive environments, significantly extending service life. With 150,000 psi tensile strength and Rockwell C33 hardness, these steel fasteners maintain integrity under extreme loads and stress conditions. The external hex drive design ensures reliable torque transmission during installation, while the fully threaded construction guarantees uniform stress distribution across the entire 1 3/4" length for maximum joint stability.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 and SAE J429 Grade 8 specifications for dimensional accuracy and mechanical properties. Features right-hand UNF fine threading with 0.5" diameter and meets environmental standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for restricted substance control.
