S-90409A181 5/8"-11 x 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 for reliable performance in high-stress applications
- Superior corrosion resistance and durability through Grade 8 steel construction with Rockwell C32 hardness
- Enhanced stability and distribution thanks to the integrated 1 21/64" flange that eliminates the need for separate washers
- Quick installation and secure fastening with UNC coarse threading and Class 2A thread fit for precise engagement
- Optimized for heavy-duty use featuring partial threading that provides both gripping power and structural integrity
- Compliance with industry standards including SAE J429 and IFI 111 specifications for consistent quality
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable operations
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in demanding industrial environments where fastener failure is not an option. The flanged design provides superior load distribution, preventing surface damage and maintaining joint integrity under vibration and dynamic loads. The UNC coarse threading ensures rapid assembly in tough materials while the partial threading configuration offers optimal clamp force control. With 150,000 psi tensile strength and Rockwell C32 hardness, these steel bolts withstand extreme mechanical stress in construction equipment, heavy machinery, and structural applications where reliability is paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 5/8"-11 UNC coarse threading and right-hand thread direction. Complies with IFI 111/SAE J429 standards for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features include 4" length, 1½" minimum thread length, external hex drive, and 15/16" head width for standard tool compatibility.
