S-92316A251 3/4"-10 x 4 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black phosphate coating for extended service life in demanding industrial environments
• Exceptional load-bearing capacity with Grade 8 strength rating and 150,000 psi tensile strength for heavy-duty applications
• Optimized installation efficiency through UNC coarse threading and Class 2A fit for faster assembly and reduced cross-threading risks
• Enhanced stability under vibration with flanged design that distributes clamping force and resists loosening
• Reliable mechanical performance backed by Rockwell C32 hardness for consistent durability and wear resistance
• Secure drive engagement with external hex head design accommodating standard wrenching tools
• Regulatory compliance assurance meeting SAE J429, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and corrosion protection are paramount. The black-phosphate steel construction provides superior rust resistance in harsh operating conditions, while the UNC coarse threading ensures rapid installation in structural steel, manufacturing fixtures, and transportation equipment. The partially threaded design with flanged head creates secure joint clamping without requiring separate washers, reducing assembly time and preventing vibration-induced failures. These industrial fasteners maintain integrity under extreme loads, making them ideal for construction, automotive, and heavy equipment applications demanding reliable, long-term performance.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent mating with standard nuts. Thread specifications conform to UNC 3/4"-10 coarse spacing with minimum 2 1/4" threaded length. Full compliance with SAE J429 Grade 8 mechanical properties, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety regulations ensures material quality and environmental responsibility.