S-94239A110 5/16"-18 x 1 3/4" SAE J429 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 classification and 150,000 psi tensile strength for critical structural applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh environments
• Optimized torque transmission with external hex drive and 1/2" head width for secure installation and removal
• Enhanced vibration resistance featuring serrated locking flange to maintain joint integrity under dynamic loads
• Reliable thread engagement with UNC coarse threading and Class 2A fit for quick assembly in various materials
• Full-length threading versatility allowing maximum adjustment range across the entire 1 3/4" length
• Industry compliance assurance meeting IFI 111, SAE J429, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc-plated steel construction provides essential corrosion protection for machinery, structural steel connections, and outdoor equipment exposed to environmental elements. The combination of Rockwell C33 hardness and 150,000 psi tensile strength ensures exceptional resistance to shear forces and permanent deformation in high-vibration environments. The flanged design with serrations eliminates the need for separate washers while providing superior clamping force and preventing loosening under dynamic loading conditions. These 5/16"-18 UNC coarse thread screws are particularly valuable in construction, manufacturing, and automotive applications where high-strength fastening solutions must withstand extreme mechanical stresses while maintaining long-term reliability.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit with UNC coarse threading (5/16"-18) and right-hand thread direction. Manufacturing complies with IFI 111 and SAE J429 specifications for Grade 8 fasteners, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.