S-92316A343 1/2"-13 x 3 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity – Grade 8 classification and 150,000 psi tensile strength ensure reliable performance in high-stress applications
• Superior Corrosion Resistance – Black phosphate steel coating provides enhanced protection against rust and environmental degradation
• Optimized Thread Engagement – 1/2"-13 UNC coarse thread design with Class 2A fit guarantees secure fastening and vibration resistance
• Enhanced Installation Efficiency – External hex drive and 3/4" head width enable quick installation with standard tools
• Increased Surface Contact – Integrated flange distributes clamping force evenly, reducing surface damage
• Precision Engineering – Rockwell C32 hardness maintains structural integrity under repeated loading cycles
• Versatile Fastening Solution – Partially threaded shank with 1 1/4" minimum thread length provides flexibility in various material thicknesses

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where reliability is critical. The black phosphate steel construction combined with UNC coarse threading provides superior resistance to vibration loosening and environmental corrosion, making them ideal for construction equipment, machinery assembly, and structural frameworks. The external hex drive and flanged design ensure rapid installation while distributing clamp load effectively across joined surfaces. With partial threading optimizing grip length, these fasteners prevent joint failure in dynamic loading conditions, offering engineers a trusted solution for demanding mechanical systems.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerance and UNC thread form specifications. Compliant with SAE J429 (IFI 111) mechanical properties, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) substance regulations. Dimensions include 3 3/4" length, 1/2"-13 thread size, and 1 5/64" flange diameter, ensuring precise integration into industrial assemblies.