S-92620A589 5/16"-18 x 1 3/4" 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 applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
- Maximum installation torque capability thanks to the external hex drive design and Rockwell C33 hardness
- Full-length threading provides consistent clamping force distribution across the entire 1-3/4" length
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability
- Right-hand thread direction enables straightforward installation using standard tools and familiar procedures
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc yellow-chromate plated steel construction provides essential corrosion protection for outdoor equipment, machinery, and structural applications exposed to moisture and chemicals. The UNC coarse thread pattern with Class 2A fit ensures rapid installation and reliable performance in vibration-prone environments, while the external hex drive accommodates high torque requirements without stripping. Engineered for heavy-duty industrial applications including construction equipment, automotive assemblies, and manufacturing machinery, these fully threaded fasteners maintain integrity under extreme mechanical stress and dynamic loading conditions.
Specification Summary & Compliance
This 5/16"-18 x 1-3/4" hex head screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent engagement. Manufactured to exacting ASME B18.2.1 dimensional standards and SAE J429 Grade 8 material specifications, ensuring mechanical properties including 150,000 PSI tensile strength and Rockwell C33 hardness. The zinc yellow-chromate plating provides corrosion resistance while maintaining compliance with industrial fastener requirements for reliable performance in demanding applications.
