S-92316A219 5/16"-18 x 2 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity with 150,000 PSI tensile strength and Grade 8 classification, ensuring reliable performance in high-stress industrial environments.
• Superior Corrosion Resistance from the black phosphate steel coating, extending service life in demanding or mildly corrosive conditions.
• Precise and Secure Fastening achieved through Class 3A thread fit and UNC coarse threading, reducing the risk of cross-threading and providing consistent clamping force.
• Enhanced Torque Application with the external hex drive and flanged head design, allowing for easier installation and improved stability without separate washers.
• Optimized for Vibration Resistance due to the partially threaded shank, which helps maintain tension and prevent loosening in dynamic applications.
• High Durability and Wear Resistance backed by Rockwell C32 hardness, ensuring the screw maintains integrity under repeated use and heavy loads.
• Broad Industrial Compliance meeting SAE J429, RoHS 3, and REACH standards, guaranteeing safety, environmental responsibility, and interoperability.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw addresses critical challenges in machinery assembly, construction, and automotive sectors. The black phosphate steel provides a protective layer that resists rust and wear, essential for outdoor or high-moisture environments. Its UNC coarse thread and Class 3A fit ensure quick, accurate installation with minimal risk of stripping, while the partially threaded design concentrates stress on the engaged portion, enhancing joint integrity in vibrating equipment. The flanged head distributes load evenly, reducing surface damage and simplifying maintenance. Ideal for securing structural components, this screw delivers long-term reliability and compliance with global standards, making it a trusted choice for engineers and procurement specialists.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread with Class 3A fit for precise dimensional accuracy, a 2 3/4" length, and a coarse thread spacing optimized for rapid assembly. Manufactured in accordance with IFI 111 / SAE J429 specifications, it ensures consistent performance and strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its safety and environmental standards for industrial use.