S-91268A446 1/2"-13 x 3" 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 resistance due to Rockwell C33 hardness, ensuring extended service life under demanding conditions
- Optimized thread engagement with coarse UNC threading and Class 2A fit for faster assembly and vibration resistance
- Enhanced torque application through the external hex drive design, allowing for secure tightening with standard tools
- Versatile partial threading providing both gripping strength and clearance where needed in structural applications
- Full regulatory compliance with RoHS 3 and REACH environmental standards, ensuring safe usage across industries
- Heavy-duty construction meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The 1/2"-13 UNC coarse thread configuration ensures rapid installation while maintaining superior clamping force in vibration-prone environments. Manufactured from high-strength steel with Rockwell C33 hardness, it resists deformation under extreme loads, making it ideal for construction, automotive, and manufacturing applications where joint integrity is paramount. The partially threaded design allows for precise load distribution, while the external hex drive facilitates high-torque installation without stripping. These industrial hex fasteners provide reliable performance in critical connections where failure is not an option.
Specification Summary & Compliance
This fastener features Class 2A thread fit per UNC standards with precise dimensional accuracy. The 3" length and 1/4" minimum thread length ensure proper engagement in various material thicknesses. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 8 specifications for mechanical properties and dimensional requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances above threshold limits.
