S-92316A240 1/2"-20 x 4 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 and Grade 8 classification for reliable performance in high-stress environments
• Enhanced corrosion resistance through black phosphate steel coating, extending service life in demanding industrial conditions
• Superior thread engagement with UNF fine thread spacing and Class 2A fit ensuring precise, vibration-resistant connections
• Optimized torque transmission via external hex drive and 3/4" head width for secure installation with standard tools
• Reduced assembly complexity with integrated flange design eliminating the need for separate washers in many applications
• Controlled thread distribution through partial threading for strategic load placement and reduced material stress
• Industry compliance assurance meeting SAE J429 specifications with RoHS 3 and REACH environmental standards

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, construction equipment, and automotive assemblies where high tensile strength and vibration resistance are paramount. The black phosphate steel construction provides essential corrosion protection in harsh operating environments, while the UNF fine thread configuration maintains secure fastening under dynamic loads. The partially threaded design concentrates stress away from the head, preventing premature failure in high-stress applications. With its external hex drive and flanged profile, installation efficiency is significantly improved, reducing assembly time in industrial maintenance and manufacturing operations where reliability cannot be compromised.

Specification Summary & Compliance

This 1/2"-20 hex head screw features precise Class 2A thread fit with UNF fine thread spacing and partial threading over a minimum 1 1/2" length. Manufactured to SAE J429 specifications for Grade 8 fasteners with Rockwell C32 hardness verification. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures responsible manufacturing standards. Dimensions include 4 1/2" length, 3/4" head width, and 1 5/64" flange diameter within inch system measurements.