S-90002A110 5/16"-18 x 1 1/4" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification
High-Strength Steel Hex Head Screws with Material Certification
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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
- Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc yellow-chromate plating in harsh industrial environments
- Enhanced durability with Rockwell C33 hardness to withstand high-stress conditions
- Reliable fastening performance through UNC coarse threading for quick assembly and vibration resistance
- Precision thread fit with Class 2A tolerance ensuring consistent engagement and reduced cross-threading risks
- Full-threaded design providing maximum grip length and uniform stress distribution
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interoperability
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial applications where failure is not an option. The steel construction combined with zinc yellow-chromate plating creates a robust fastener that resists corrosion while maintaining structural integrity under extreme loads. The UNC coarse thread design ensures rapid installation in heavy machinery, construction equipment, and automotive assemblies, while the external hex drive provides superior torque transmission during tightening operations. These fully threaded screws distribute stress evenly across the entire fastener length, making them ideal for critical joints in structural frameworks, industrial machinery, and transportation equipment where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
Manufactured to exacting standards with Class 2A thread fit tolerance for precision engagement and UNC coarse thread specifications. These hex head screws comply with ASME B18.2.1 dimensional requirements and SAE J429 material specifications, ensuring consistent quality and performance. The 5/16"-18 thread size with 1-1/4" length provides standardized compatibility across industrial applications. Manufactured from high-strength steel with Rockwell C33 hardness and 150,000 psi tensile strength for reliable performance in the most demanding fastening scenarios.
