S-91268A352 7/16"-14 x 1 1/4" 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 load-bearing capacity with 150,000 PSI tensile strength for reliable performance in high-stress industrial applications.
- Superior wear and deformation resistance due to Rockwell C33 hardness, ensuring long-term durability and reduced replacement frequency.
- Optimal grip and torque transmission with a 5/8" external hex head, facilitating easy installation and removal with standard tools.
- Enhanced vibration resistance and quick assembly from the coarse 7/16"-14 UNC thread, maintaining secure fastening under dynamic loads.
- Precise thread fit and interchangeability with Class 2A tolerance, ensuring consistent performance and compatibility across assemblies.
- Full thread engagement along the 1-1/4" length for maximum holding power and uniform stress distribution in thick materials.
- Compliance with rigorous industry standards including ASME B18.2.1 and SAE J429, guaranteeing quality and reliability for critical projects.
Professional Applications & Engineering Value
Engineered for demanding environments, this Grade 8 steel hex head screw addresses common industrial challenges like joint failure and material fatigue. The fully threaded 7/16"-14 UNC coarse thread design provides excellent grip in soft or brittle materials, reducing the risk of stripping. Its high tensile strength and Rockwell C33 hardness make it ideal for heavy machinery, construction, and automotive assemblies where vibration and dynamic loads are prevalent. The external hex drive allows for efficient torque application, speeding up installation in tight spaces while maintaining integrity under extreme conditions.
Specification Summary & Compliance
This screw features a Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy. It meets ASME B18.2.1 and SAE J429 specifications for Grade 8 fasteners, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally conscious and safe industrial use.
