S-91286A318 1/2"-13 x 1 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 load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh industrial environments
- Optimized torque transmission through external hex drive design, ensuring secure installation with standard tools
- Consistent thread engagement with UNC coarse threading and Class 2A fit, preventing cross-threading and simplifying assembly
- Enhanced durability from Rockwell C33 hardness, maintaining structural integrity under repeated stress cycles
- Full thread coverage along the 1-1/2" length, providing maximum grip strength across the entire fastener
- Regulatory compliance assurance meeting ASME, SAE, RoHS 3, and REACH standards for quality and environmental safety
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Grade 8 hex head screws deliver critical performance where failure is not an option. The steel construction combined with zinc-flake coating provides exceptional protection against corrosion in manufacturing, construction, and heavy equipment environments. The UNC coarse thread pattern with Class 2A fit ensures rapid installation and reliable clamping force, while the external hex drive design allows for high-torque applications without stripping. These fully threaded fasteners maintain consistent 150,000 psi tensile strength throughout, making them ideal for structural connections, machinery assembly, and other high-stress applications where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This Grade 8 hex head screw features precise Class 2A thread fit with 1/2"-13 UNC coarse threading and right-hand orientation. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance reliability. The fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, confirming environmental safety and regulatory adherence for global industrial applications.
