S-92316A737 1/2"-13 x 6" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Strength for Demanding Environments: Grade 8 classification and 150,000 psi tensile strength ensure reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Superior Corrosion Resistance: The black-phosphate steel finish provides a durable protective layer, extending the screw's service life in harsh or outdoor industrial settings.
• Optimized for High-Torque Applications: The external hex drive and 3/4" head width allow for secure tool engagement and efficient installation with common wrenches, speeding up assembly processes.
• Enhanced Load Distribution: The integrated flange design eliminates the need for a separate washer, providing a larger bearing surface to prevent material damage and maintain joint integrity.
• Reliable Thread Engagement: UNC coarse threads and Class 2A thread fit offer quick assembly and consistent clamping force, minimizing cross-threading risks in high-vibration environments.
• Robust Material Hardness: Rockwell C32 hardness ensures high wear resistance and durability, maintaining thread integrity through repeated use and disassembly.
• Versatile Partial Threading: The 1 1/4" minimum thread length on a 6" shank allows for precise adjustment and secure fastening in a wide range of material thicknesses.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address the critical need for reliable, high-strength fastening in heavy-duty industrial applications. The black-phosphate steel construction provides superior corrosion resistance, making it ideal for construction equipment, agricultural machinery, and structural frameworks exposed to demanding environmental conditions. The UNC coarse thread design ensures rapid installation and robust performance in high-vibration settings, such as automotive assemblies and manufacturing fixtures, where thread stripping is a common concern. The flanged head eliminates washer requirements, streamlining inventory and reducing assembly time while providing excellent clamp load distribution on softer materials. With its 150,000 psi tensile strength and external hex drive, this screw delivers the durability and torque capacity needed for critical connections in infrastructure projects and heavy machinery maintenance, ensuring long-term operational safety and reducing downtime.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for standard tolerance and interchangeability. It is manufactured to meet IFI 111 / SAE J429 specifications for Grade 8 fasteners, ensuring consistent mechanical properties and dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious industrial markets without hazardous substance restrictions.