S-94239A413 1/2"-13 x 1 3/4" IFI 111 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 strength rating and 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• Enhanced vibration resistance with serrated locking flange that prevents loosening under dynamic loads
• Precise thread engagement with Class 3A fit and UNC coarse threads for faster assembly and reduced cross-threading risk
• Optimized torque transmission through external hex drive design and substantial head dimensions for secure fastening
• Full-thread engagement capability along the entire 1 3/4" length for maximum grip strength in thick materials
• Regulatory compliance assurance meeting multiple industry standards for quality and environmental safety

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this Grade 8 hex head screw addresses critical challenges in heavy machinery, structural assemblies, and equipment manufacturing. The zinc-plated steel construction provides essential corrosion protection while maintaining the high tensile strength required for load-bearing connections. The UNC coarse thread design ensures rapid installation and reliable performance in materials where fine threads might strip or fail. With its serrated locking flange, this fastener effectively counters vibration-induced loosening - a common failure point in dynamic systems. The fully threaded configuration allows for maximum engagement depth, making it ideal for thick-section assemblies where consistent clamping force is paramount for structural integrity and safety.

Specification Summary & Compliance

This 1/2"-13 hex head screw features precision Class 3A thread fit with UNC coarse threading and right-hand orientation. Manufactured to exacting standards including IFI 111 and SAE J429 Grade 8 specifications, it delivers consistent dimensional accuracy and mechanical properties. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets while maintaining the Rockwell C33 hardness and mechanical characteristics required for critical applications.