S-90409A141 3/8"-16 x 3 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress industrial applications
• Superior durability and wear resistance thanks to Grade 8 steel construction and Rockwell C32 hardness
• Enhanced vibration resistance through UNC coarse threading and Class 2A thread fit for secure fastening in demanding environments
• Simplified installation and removal with external hex drive design providing maximum torque application
• Improved load distribution from the integrated flange design that eliminates the need for separate washers
• Optimized thread engagement with partial threading that maintains structural integrity while reducing weight
• Long-term reliability ensured by compliance with SAE J429, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value for heavy machinery, construction equipment, and structural assemblies where failure is not an option. The 3/8"-16 UNC coarse thread configuration provides superior resistance to vibration loosening, while the partial threading maintains full shank strength in critical shear applications. The integrated flange design distributes clamping force evenly, preventing surface damage and eliminating washer requirements. Manufactured from high-strength steel with Rockwell C32 hardness, this fastener withstands extreme loads and harsh operating conditions, making it ideal for industrial equipment, automotive frames, and structural steel connections where 150,000 psi tensile strength is essential for safety and performance.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit with 3/8"-16 UNC coarse threading and partial threading up to 1" minimum thread length. The fastener meets IFI 111 specifications where identified as SAE J429 Grade 8, ensuring consistent manufacturing quality and performance standards. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and restricted substance management for global industrial applications.