S-90409A133 3/8"-16 x 1 1/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 Steel Flanged 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, ideal for high-stress industrial assemblies
- Superior wear and corrosion resistance due to Grade 8 steel construction and Rockwell C32 hardness
- Efficient installation and removal with external hex drive and flanged design that eliminates the need for separate washers
- Reliable thread engagement with UNC coarse spacing and Class 2A thread fit, reducing cross-threading risks
- Full-length threading provides consistent clamping force along the entire 1 1/4" length for secure fastening
- Compliance with major industry standards including SAE J429, ensuring consistent performance and interchangeability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global supply chain integration
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical performance in demanding applications where failure is not an option. The steel construction combined with 150,000 PSI tensile strength provides exceptional resistance to vibration loosening and structural fatigue in heavy machinery, construction equipment, and automotive assemblies. The flanged design distributes clamping force over a wider surface area (13/16" flange diameter), preventing surface damage and maintaining joint integrity. With UNC coarse threads and Class 2A thread fit, these screws offer faster installation in tough materials while maintaining precise tolerances. The external hex drive allows for high-torque application using standard tools, making them ideal for maintenance operations and production lines where time efficiency matters.
Specification Summary & Compliance
This 3/8"-16 hex head screw features UNC coarse thread spacing with Class 2A thread fit for consistent engagement and interchangeability. Manufactured to SAE J429 specifications for Grade 8 fasteners, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring restricted substance compliance.
