S-90602A236 1/2"-13 x 2 1/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance under extreme loads.
• Superior corrosion resistance provided by the zinc yellow-chromate plating, extending the fastener's service life in harsh industrial environments.
• Optimized for quick and secure assembly thanks to the UNC coarse threading, which reduces cross-threading and allows for faster installation.
• Enhanced load distribution and vibration resistance from the integrated flange, eliminating the need for a separate washer and providing a more stable connection.
• Precision thread fit for reliable fastening with Class 3A thread tolerance, ensuring consistent clamp load and reducing the risk of loosening.
• Robust drive system for high-torque applications featuring an external hex drive and substantial head dimensions, allowing for secure tool engagement and efficient installation.
• Proven compliance with industry standards, meeting IFI 111/SAE J429 specifications for guaranteed quality and interchangeability.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw is the ideal solution for high-stress environments where failure is not an option. The zinc yellow-chromate plated steel construction provides a robust barrier against corrosion, making it suitable for outdoor machinery, construction equipment, and automotive assemblies exposed to moisture and chemicals. Its UNC coarse thread design ensures rapid installation and superior resistance to vibration loosening, a common challenge in dynamic load scenarios. The flanged design distributes clamping force over a wider area, reducing surface pressure and preventing material damage. With a partial thread length, it offers precise grip range control, making it perfect for structural connections in frameworks, heavy machinery, and infrastructure projects that demand high tensile strength and long-term reliability.

Specification Summary & Compliance

This fastener features a 1/2"-13 UNC coarse thread with a Class 3A thread fit for precision and consistency. It is manufactured from high-strength steel and meets the requirements of IFI 111 / SAE J429 specifications, ensuring compliance with recognized industry standards for dimensional accuracy and mechanical properties. The product is designed to deliver reliable performance in line with common industrial regulations, providing assurance of quality and suitability for professional use.