S-90393A117 5/16"-18 x 1" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Grade 5 classification and Rockwell C22 hardness provide superior durability and resistance to wear, extending the service life of your assemblies.
• Coarse UNC threading with Class 2A fit allows for quick and easy installation, saving time and labor costs in production environments.
• Serrated locking flange enhances vibration resistance, maintaining tight connections in dynamic or high-vibration machinery.
• Fully threaded design offers consistent grip along the entire length, improving load distribution and joint integrity.
• External hex drive and standard hex head enable straightforward installation with common tools, streamlining maintenance and assembly processes.
• Compliance with SAE J429, RoHS 3, and REACH ensures environmental safety and meets rigorous industry standards for quality and regulatory requirements.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and high tensile stress. The coarse UNC thread and serrated flange work together to provide secure fastening in heavy machinery, automotive assemblies, and structural frameworks, where reliability is critical. Made with precise Class 2A thread fit, it ensures consistent engagement and reduces the risk of cross-threading during installation. Ideal for applications requiring 120,000 PSI tensile strength, this fastener supports long-term performance in demanding environments, minimizing maintenance needs and enhancing overall system safety. Its fully threaded design and external hex drive further simplify use in tight spaces, making it a versatile choice for engineers and procurement specialists.

Specification Summary & Compliance

This product features a 5/16"-18 UNC coarse thread with Class 2A tolerance for precise fit and ease of assembly. It meets IFI 111 specifications under SAE J429 for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.