S-94239A411 1/2"-13 x 1 1/4" IFI 111 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws
High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with Grade 8 classification and 150,000 PSI tensile strength for reliable performance in high-stress applications.
- Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh industrial environments.
- Enhanced vibration resistance through UNC coarse threading and Class 3A thread fit, minimizing loosening under dynamic loads.
- Increased stability and load distribution with integrated flange design, reducing the need for separate washers.
- Optimized for heavy-duty assembly featuring external hex drive and serrations for secure, non-slip tightening.
- Full thread engagement across the 1 1/4" length ensures consistent clamping force and structural integrity.
- Compliance with major industry standards including IFI 111 and SAE J429, guaranteeing interchangeability and quality assurance.
Professional Applications & Engineering Value
Engineered for demanding heavy-duty applications, this Grade 8 hex head screw addresses critical challenges in construction, machinery assembly, and structural frameworks. The zinc-plated steel material provides a durable barrier against rust and corrosion, essential for outdoor or moisture-exposed environments. Its UNC coarse thread and Class 3A thread fit deliver superior resistance to vibration-induced loosening, a common failure point in dynamic systems. The flanged design distributes clamping force evenly, reducing surface pressure and preventing material damage. With a Rockwell C33 hardness and full threading, it ensures reliable performance in high-torque settings, making it ideal for securing heavy components in industrial equipment and infrastructure projects.
Specification Summary & Compliance
This fastener meets precise dimensional tolerances with Class 3A thread fit and adheres to UNC coarse thread standards. Manufacturing complies with IFI 111 and SAE J429 specifications, ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial use.
