S-92323A578 1/2"-13 x 2 1/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional holding power with Grade 5 strength rating providing 110,000 PSI tensile strength for heavy-duty applications
• Reliable thread engagement through UNC coarse threading with Class 2A fit ensuring secure fastening in various materials
• Enhanced stability with integrated flange design distributing load evenly and preventing surface damage
• Optimized installation efficiency with external hex drive and standard 3/4" head width for common tool compatibility
• Preventive locking capability through serrations under the head that resist loosening under vibration
• Industry compliance assurance meeting IFI 111/SAE J429 standards for consistent quality and performance

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 5 zinc-plated steel hex head screws deliver critical performance where vibration resistance and structural integrity are paramount. The combination of Rockwell C22 hardness and 110,000 PSI tensile strength ensures reliable performance in construction equipment, machinery assembly, and structural frameworks. The UNC coarse thread pattern with Class 2A fit provides excellent engagement in both metals and plastics, while the flanged design eliminates the need for separate washers, reducing installation time and component count. The zinc plating offers essential corrosion protection for applications exposed to moisture or harsh environmental conditions, making these fully threaded screws ideal for permanent installations requiring long-term reliability.

Specification Summary & Compliance

These 1/2"-13 hex head screws feature precise Class 2A thread fit per UNC standards with coarse thread spacing for optimal performance. Manufacturing complies with IFI 111 specifications where identified as SAE J429 for Grade 5 fasteners. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. Dimensions include 2-1/4" length, 3/4" head width, and 1-5/64" flange diameter for standardized application across industrial equipment and structural assemblies.