S-92316A552 1/4"-20 x 2 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance under extreme loads, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-phosphate steel coating extends service life and maintains integrity in harsh industrial environments.
• Flanged head design eliminates the need for separate washers, speeding up assembly and providing a larger bearing surface for enhanced stability.
• Grade 8 classification and Rockwell C32 hardness deliver high durability and resistance to wear, ideal for heavy machinery and structural uses.
• Coarse UNC threads and Class 2A fit allow for quick installation and secure fastening, minimizing cross-threading issues in coarse-thread applications.
• Partial threading offers unthreaded shank strength where needed, preventing loosening under vibration and improving load distribution.
• Compliance with SAE J429, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, supporting safe and sustainable operations.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw combines black-phosphate steel and a flanged design to address common challenges like corrosion, vibration loosening, and high-stress fatigue. The 1/4"-20 UNC coarse thread with Class 2A fit ensures precise engagement in materials such as metal frameworks and machinery, reducing installation time while maintaining high tensile strength. Ideal for construction, automotive, and equipment assembly, it provides long-term reliability by resisting environmental wear and meeting strict SAE J429 standards, making it a cost-effective solution for critical fastening needs.

Specification Summary & Compliance

This fastener features a 1/4"-20 UNC coarse thread with Class 2A tolerance for consistent fit, partial threading for optimized strength, and dimensions including a 2 1/2" length and 3/8" head width. It complies with IFI 111 (SAE J429) for mechanical properties, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety, ensuring full regulatory adherence in industrial settings.