S-92323A120 5/16"-18 x 2 1/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Zinc-plated steel construction provides superior corrosion resistance, extending the service life of the screw in harsh environments.
• External hex drive and hex head design allow for easy installation and high torque application with standard tools, improving assembly efficiency.
• Coarse UNC threading and Class 2A fit enable quick engagement and secure fastening, minimizing cross-threading and assembly errors.
• Flanged design with serrations enhances locking capability and distributes load evenly, preventing loosening under vibration.
• Full threading along the 2 1/4" length offers versatile grip depth and consistent holding power across various material thicknesses.
• Compliance with SAE J429, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, supporting safe and sustainable usage.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in demanding environments. Its UNC coarse thread and Class 2A fit provide reliable fastening in materials like metal and heavy-duty plastics, reducing installation time and maintenance needs. The external hex drive facilitates high-torque applications, making it ideal for machinery, automotive assemblies, and construction projects where strength and durability are critical. The flanged design with serrations adds an extra layer of security, ensuring stable performance in dynamic loads. By combining robust tensile strength with zinc plating, this screw delivers long-term reliability in sectors like manufacturing, infrastructure, and equipment repair, minimizing downtime and replacement costs.

Specification Summary & Compliance

This screw features precise UNC coarse threading with Class 2A fit for consistent engagement and tolerance. It meets IFI 111 specifications under SAE J429 for mechanical properties, ensuring high tensile strength (110,000 PSI) and Rockwell C22 hardness. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and industrial standards for reliable, sustainable fastening solutions.