S-92620A283 5/16"-18 x 3/8" 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 Capability: Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress industrial and construction applications.
- Superior Corrosion Resistance: Zinc yellow-chromate plating provides enhanced protection against rust and environmental degradation, extending service life.
- High Durability & Wear Resistance: Rockwell C33 hardness offers excellent resistance to deformation and wear under heavy-duty use.
- Easy Installation & Secure Fastening: External hex drive and coarse UNC threads allow for quick assembly and strong holding power with standard tools.
- Precision Thread Fit: Class 2A thread fit ensures consistent, reliable engagement with mating components, reducing the risk of cross-threading.
- Full Thread Engagement: Fully threaded design maximizes grip length and distributes load evenly across the entire fastener.
- Regulatory Compliance & Quality Assurance: Meets ASME B18.2.1, SAE J429, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, structural steel connections, and high-vibration environments. The steel construction combined with Rockwell C33 hardness prevents stripping and shearing under extreme loads, while the zinc yellow-chromate finish resists corrosion in outdoor or chemically aggressive settings. The coarse UNC thread and Class 2A fit provide rapid assembly and secure fastening, reducing installation time and minimizing loosening in dynamic applications. Ideal for construction, automotive, and industrial equipment, these screws deliver reliable performance where failure is not an option.
Specification Summary & Compliance
Manufactured to exacting standards, this fastener features a 5/16"-18 UNC coarse thread with Class 2A tolerance for precise fit. It complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. The product is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for global industrial use.
