S-90409A214 3/4"-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 demanding industrial applications
• Superior wear resistance thanks to Rockwell C32 hardness and Grade 8 steel construction
• Enhanced vibration resistance through UNF fine threading and Class 2A thread fit
• Increased stability and load distribution with integrated flange design
• Reliable torque transmission via external hex drive and 1 1/8" head width
• Industry-standard compliance meeting IFI 111 and SAE J429 specifications
• Optimized thread engagement with partial threading for specific clamping requirements

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical performance in heavy machinery, structural assemblies, and high-vibration environments where failure is not an option. The UNF fine threading provides superior resistance to loosening under dynamic loads, while the flanged design eliminates the need for separate washers, reducing assembly time and improving joint integrity. Manufactured from high-strength steel with Rockwell C32 hardness, this fastener maintains its mechanical properties in demanding conditions, making it ideal for construction equipment, automotive frames, and industrial machinery requiring 150,000 psi tensile strength and reliable, long-term performance.

Specification Summary & Compliance

This 3/4"-16 UNF hex head screw features Class 2A thread fit for precise assembly, partial threading with minimum 1 3/4" thread length, and complies with IFI 111/SAE J429 specifications. The fastener meets industry standards for dimensional accuracy and mechanical properties, ensuring consistent performance in critical applications where quality and reliability are paramount.