S-90409A153 1/2"-13 x 2 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 applications
• Superior corrosion resistance and durability through high-grade steel construction and Rockwell C32 hardness rating
• Secure anti-loosening performance with integrated flange design that eliminates the need for separate washers
• Optimized thread engagement through UNC coarse threading and Class 2A fit for faster assembly and vibration resistance
• Enhanced torque transmission with external hex drive and 3/4" head width for secure tool engagement
• Versatile partial threading allowing for both clamping and alignment functions in various assembly scenarios
• Regulatory compliance assurance meeting SAE J429, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assemblies. The 1/2"-13 UNC coarse thread configuration provides superior resistance to vibrational loosening while enabling rapid installation in demanding environments. The flanged design eliminates washer requirements and distributes clamping force evenly, preventing surface damage and maintaining joint integrity. Manufactured from premium steel with Rockwell C32 hardness, this fastener maintains dimensional stability under extreme loads, making it ideal for construction equipment, automotive frames, and manufacturing machinery where 150,000 psi tensile strength is essential for safety and longevity.

Specification Summary & Compliance

This inch system fastener features precise Class 2A thread fit with UNC coarse threading (1/2"-13) and partial threading up to 1-1/4" minimum thread length. The 2-1/2" length with 1-5/64" flange diameter provides optimal clamping range. Manufactured to IFI 111 specifications meeting SAE J429 requirements for Grade 8 fasteners. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.