S-92323A135 5/16"-24 x 3/4" 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 under high-stress conditions, reducing the risk of fastener failure.
• Corrosion-resistant zinc-plated steel provides durable protection against rust, extending service life in harsh industrial environments.
• Flange design with serrations eliminates the need for a separate washer and offers superior vibration resistance, maintaining joint integrity.
• Fine UNF thread spacing and Class 2A fit deliver precise engagement and improved load distribution for critical assemblies.
• External hex drive allows for high-torque installation with standard tools, speeding up assembly and reducing labor time.
• Grade 5 strength classification and Rockwell C22 hardness guarantee consistent mechanical properties for demanding applications.
• Full threading along the 3/4" length ensures maximum grip and adjustability in a variety of material thicknesses.

Professional Applications & Engineering Value

This 5/16-24 UNF hex head screw is engineered to address common challenges in industrial fastening, such as vibration loosening and corrosion. The zinc-plated steel construction offers excellent environmental resistance, making it suitable for outdoor equipment, automotive assemblies, and machinery exposed to moisture. The integrated flange with serrations acts as a built-in washer, distributing clamp load effectively and preventing back-off in dynamic applications. With its fine thread and Class 2A fit, it provides superior holding power in metals and plastics, reducing the need for frequent retightening. Ideal for use in construction, manufacturing, and automotive sectors, this screw ensures long-term reliability and compliance with industry standards, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This fastener features precise UNF fine threads with Class 2A tolerance, ensuring consistent fit and performance. It meets SAE J429 specifications for Grade 5 mechanical properties, including tensile strength and hardness. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for various industrial applications. Manufacturing adheres to IFI 111 standards, guaranteeing quality and reliability.