S-92620A913 7/8"-9 x 3 1/2" 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 from zinc yellow-chromate plating extends service life in harsh industrial environments, minimizing maintenance needs.
- High hardness rating (Rockwell C33) provides excellent wear resistance and durability under repetitive loads.
- Coarse UNC threading with Class 2A fit allows for quick installation and secure fastening, improving assembly efficiency.
- Full threading along the entire 3 1/2" length offers versatile clamping capability across various material thicknesses.
- External hex drive design enables easy torque application with standard tools, ensuring tight and consistent connections.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability in regulated industries.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for demanding industrial applications where failure is not an option. The steel construction combined with zinc yellow-chromate plating provides robust protection against corrosion, making it ideal for outdoor machinery, construction equipment, and automotive assemblies exposed to moisture and chemicals. The coarse UNC thread and Class 2A fit ensure rapid installation and vibration resistance, reducing loosening in dynamic environments. With full threading and external hex drive, it delivers uniform clamping force and easy maintenance access, solving common challenges in heavy-duty fastening while meeting ASME B18.2.1/SAE J429 standards for reliability.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit with 7/8"-9 UNC coarse threads and right-hand direction, manufactured to ASME B18.2.1 and SAE J429 specifications. It maintains dimensional accuracy with a length of 3 1/2", head width of 1 5/16", and full threading for consistent performance. The product complies with industry standards for high tensile strength and material integrity, ensuring suitability for regulated applications requiring documented compliance.
