S-92620A597 5/16"-18 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
- Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc yellow-chromate plating extends service life in harsh industrial environments.
- High hardness rating (Rockwell C33) provides excellent wear resistance and durability under repetitive loads.
- Coarse UNC threads with Class 2A fit enable quick assembly and secure fastening in various materials.
- Full threading along the 4" length offers maximum grip and adjustability for deep or variable material thicknesses.
- External hex drive design allows for high torque application with standard tools, speeding up installation.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability in professional settings.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration and dynamic loads are common. The steel material and UNC coarse thread design provide superior clamping force and resistance to loosening, while the zinc yellow-chromate plating protects against rust and chemical exposure in outdoor or corrosive environments. Its fully threaded 4-inch length ensures uniform stress distribution and versatility in connecting thick components, making it ideal for structural frames, engine mounts, and industrial equipment requiring high tensile strength and long-term reliability. By meeting ASME B18.2.1 specifications, it delivers precise dimensional accuracy for seamless integration into existing systems.
Specification Summary & Compliance
This fastener features a 5/16"-18 UNC coarse thread with Class 2A thread fit for consistent engagement and ease of assembly. It complies with ASME B18.2.1 and SAE J429 standards, ensuring adherence to dimensional and mechanical requirements. The zinc yellow-chromate plating offers environmental protection, and the product aligns with industry regulations for performance and safety in industrial applications.
