S-92620A616 5/16"-24 x 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
- Maximum Load-Bearing Capacity with 150,000 psi tensile strength and Grade 8 classification for reliable performance in high-stress applications
- Superior Corrosion Resistance through zinc yellow-chromate plating that protects against rust and extends service life in harsh environments
- Precise Thread Engagement with UNF fine threading and Class 2A fit ensuring secure fastening and vibration resistance
- Enhanced Durability from Rockwell C33 hardness providing excellent wear resistance and structural integrity
- Optimal Torque Transfer via external hex drive design that prevents stripping and allows for high tightening forces
- Full Thread Coverage along the entire 4" length for maximum grip strength and adjustment flexibility
- Industry Compliance Assurance meeting ASME B18.2.1 and SAE J429 specifications for quality and reliability
Professional Applications & Engineering Value
This Grade 8 steel hex head screw delivers exceptional engineering value for heavy-duty industrial applications where failure is not an option. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures reliable performance in structural assemblies, machinery, and equipment subjected to extreme loads and vibrations. The UNF fine threading provides superior resistance to loosening under dynamic loads, while the zinc yellow-chromate plating offers robust corrosion protection in demanding environments. The external hex drive design enables high torque application without slippage, making these industrial fasteners ideal for critical connections in construction, automotive, and manufacturing sectors where precision and reliability are paramount.
Specification Summary & Compliance
This 5/16"-24 x 4" hex head screw features precise Class 2A thread fit tolerances with UNF fine threading and right-hand thread direction. Manufactured to meet ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance consistency. The fastener complies with industry standards for Grade 8 strength classification and features full threading along its entire length for maximum engagement capability.
