S-90409A215 3/4"-16 x 4" 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 Grade 8 steel construction with Rockwell C32 hardness
• Precise thread engagement with UNF fine threading and Class 2A fit for vibration-resistant connections
• Enhanced stability and distribution thanks to the integrated flange design that eliminates need for separate washers
• Optimized torque transmission through the external hex drive and 1 1/8" head width for secure installation
• Reduced cross-threading risk with partially threaded shank design for easier alignment and assembly
• Regulatory compliance assurance meeting IFI 111/SAE J429 standards plus RoHS 3 and REACH environmental directives

Professional Applications & Engineering Value

This Grade 8 steel hex head screw delivers critical performance advantages for heavy machinery, structural assemblies, and industrial equipment where vibration resistance and long-term reliability are paramount. The UNF fine threading provides superior clamping force distribution compared to coarse threads, while the partially threaded design ensures precise engagement in tapped holes without binding. The integrated flange eliminates the need for separate washers, reducing assembly time and providing superior load distribution. With 150,000 psi tensile strength and Rockwell C32 hardness, this fastener maintains integrity under extreme mechanical stress, making it ideal for construction equipment, automotive frames, and industrial machinery where failure is not an option.

Specification Summary & Compliance

This 3/4"-16 UNF hex head screw features Class 2A thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. The 4" length with 1 3/4" minimum thread length provides optimal engagement for various material thicknesses. Manufacturing complies with IFI 111/SAE J429 Grade 8 specifications for material and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) directives, ensuring safe use in regulated industrial environments worldwide.