S-92620A609 5/16"-24 x 5/8" 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 for critical structural applications
- Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh environments
- Precise Class 2A thread fit ensures smooth assembly and reliable engagement in UNF fine-threaded connections
- Exceptional durability with Rockwell C33 hardness, maintaining integrity under high-stress conditions
- Full-length threading provides consistent clamping force and superior holding power across the entire fastener length
- Standard-compliant engineering meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interchangeability
- External hex drive design enables high-torque installation with common tools for efficient assembly
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 8 hex head screw delivers exceptional performance where reliability is non-negotiable. The 5/16"-24 UNF fine thread configuration provides superior resistance to vibration loosening while maintaining precise alignment in machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating creates a protective barrier against corrosive elements in manufacturing environments, offshore operations, and outdoor equipment. With fully threaded design and external hex drive, these fasteners ensure maximum thread engagement and straightforward installation using standard tools, reducing assembly time while providing the high tensile strength required for critical connections in construction equipment, industrial machinery, and transportation systems.
Specification Summary & Compliance
This 5/8" length hex head screw features precise Class 2A thread fit with 5/16"-24 UNF fine threads in right-hand direction, manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications. The fastener maintains dimensional accuracy within inch system tolerances and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both mechanical performance and regulatory compliance for global industrial applications.
