S-92620A728 1/2"-13 x 4 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 yellow-chromate plating, extending service life in harsh environments
- Optimized thread engagement through Class 2A UNC coarse threads ensuring secure fastening and easy installation
- Maximum thread coverage with fully threaded design for consistent clamping force along the entire fastener length
- Enhanced torque transmission via external hex drive and 3/4" head width for efficient installation with standard tools
- Guaranteed material integrity with Rockwell C33 hardness maintaining structural stability under heavy loads
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and reliable fastening are paramount. The zinc yellow-chromate plating provides essential corrosion protection in demanding environments, while the UNC coarse thread configuration ensures rapid installation and vibration resistance. The fully threaded design offers uniform stress distribution across the entire 4 1/2" length, making these external hex drive fasteners ideal for construction, manufacturing, and automotive applications requiring 150,000 psi tensile strength and consistent performance under extreme conditions.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance for optimal assembly performance. Complies with ASME B18.2.1 and SAE J429 specifications governing dimensional requirements and mechanical properties. Features 1/2"-13 UNC coarse thread with right-hand direction and full threading along the 4 1/2" length. The zinc yellow-chromate finish provides corrosion resistance while maintaining the Grade 8 mechanical properties including Rockwell C33 hardness and 150,000 psi tensile strength.
