S-90409A179 5/8"-11 x 3" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 steel construction and 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior wear resistance due to Rockwell C32 hardness, ensuring extended service life in demanding industrial environments
• Enhanced stability and distribution from the integrated flange design, reducing the need for separate washers and preventing surface damage
• Quick installation and removal with external hex drive and coarse UNC threading, ideal for maintenance-heavy operations
• Precise thread engagement through Class 2A thread fit, minimizing cross-threading risks and ensuring consistent fastening torque
• Partial threading design provides optimal grip on specific material thicknesses while maintaining unthreaded shank strength
• Full regulatory compliance with RoHS 3, REACH, and IFI 111/SAE J429 standards, guaranteeing safety and environmental responsibility

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical performance where failure is not an option. The 5/8"-11 UNC coarse thread configuration ensures rapid assembly in structural steel, machinery frames, and construction equipment, while the flanged design eliminates washer migration and provides superior clamping force distribution. Manufactured from high-strength steel with Rockwell C32 hardness, these partially threaded fasteners maintain integrity under extreme vibration and dynamic loading conditions common in automotive, agricultural, and manufacturing sectors. The external hex drive accommodates standard tools for efficient maintenance cycles, making them ideal for both original equipment manufacturing and field service applications requiring 150,000 psi tensile strength reliability.

Specification Summary & Compliance

This inch system fastener features precise Class 2A thread fit tolerances with 5/8"-11 UNC coarse threading and right-hand thread direction. Manufacturing complies with IFI 111 specifications SAE J429, ensuring consistent quality and dimensional accuracy. The product is verified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (06/14/2023 235 SVHC), meeting international environmental and safety standards for industrial use.