S-92316A544 1/4"-20 x 1 1/4" 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 critical applications.
• Superior corrosion resistance with black-phosphate steel coating, extending service life in harsh industrial environments without compromising structural integrity.
• Optimized torque transmission via the external hex drive and flanged design, providing secure installation and minimizing tool slippage during high-torque applications.
• Precision threading with Class 2A fit and UNC coarse profile delivers consistent engagement and vibration resistance, maintaining joint integrity over time.
• Full threading along the 1-1/4" length allows for versatile mounting depths and uniform stress distribution across the entire fastener.
• Heavy-duty Grade 8 certification guarantees compliance with SAE J429 standards, ensuring mechanical properties meet rigorous industrial requirements.
• Environmental regulation compliance with RoHS 3 and REACH, making these screws suitable for global supply chains and eco-conscious manufacturing.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 8 hex head screws address common challenges like vibration loosening and corrosion in machinery, construction, and automotive assemblies. The black-phosphate steel finish provides a protective barrier against moisture and chemicals, while the UNC coarse threads and Class 2A fit ensure quick installation and reliable hold in materials prone to stripping. The flanged design eliminates the need for separate washers, streamlining assembly and reducing part counts. With a 150,000 PSI tensile strength and external hex drive, these screws withstand high-stress conditions, making them ideal for structural frames, engine components, and heavy equipment where durability and torque resistance are paramount.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including UNC thread specifications with a Class 2A thread fit for consistent tolerance. Manufacturing follows IFI 111 specifications aligned with SAE J429 for Grade 8 mechanical properties, ensuring hardness of Rockwell C32 and verified tensile strength. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms the absence of restricted substances, supporting use in regulated industries.