S-92323A524 1/4"-20 x 1 3/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Superior load-bearing capacity with Grade 5 classification and 110,000 psi tensile strength for reliable heavy-duty applications
• Quick and secure installation through external hex drive and UNC coarse threading, reducing assembly time and preventing cross-threading
• Improved fastening stability with integrated flange design, eliminating the need for separate washers and distributing clamp load effectively
• Precision thread engagement with Class 2A thread fit, ensuring consistent performance and vibration resistance in machinery
• Full-length threading provides maximum grip along the entire shank, ideal for thick materials and structural connections
• Regulatory compliance assurance meeting SAE J429, RoHS 3, and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw delivers critical performance where vibration resistance and structural integrity are paramount. The UNC coarse thread design prevents loosening under dynamic loads while enabling rapid installation in construction equipment, automotive assemblies, and heavy machinery frames. The zinc plating creates a sacrificial barrier against oxidation, significantly outperforming uncoated fasteners in humid or outdoor environments. Combined with the flanged head that eliminates washer requirements, this screw reduces part count and assembly complexity in high-stress joints. Its fully threaded 1-3/4" length ensures maximum thread engagement in thick materials, making it ideal for structural steel connections, industrial platforms, and machinery guarding systems where disassembly is infrequent but reliability is non-negotiable.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC 1/4"-20 coarse threading and right-hand orientation. Complies with IFI 111/SAE J429 specifications for Grade 5 fasteners, demonstrating Rockwell C22 hardness and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for industrial use. Features external hex drive with 3/8" head width and 9/16" flange diameter for standardized tool compatibility.