S-92323A542 5/16"-18 x 1 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 in high-stress applications, reducing the risk of fastener failure.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life in harsh industrial environments.
• Coarse UNC threading allows for quicker installation and better grip in softer materials, improving assembly efficiency.
• External hex drive with serrated locking offers secure, non-slip fastening and vibration resistance, minimizing maintenance needs.
• Flanged design eliminates the need for separate washers, distributing load evenly and speeding up installation.
• Grade 5 classification and Rockwell C22 hardness deliver consistent durability and wear resistance for heavy-duty use.
• Full threading along the 1 3/4" length ensures maximum holding power and versatility in various material thicknesses.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw is engineered to address common challenges in industrial and construction settings, such as vibration loosening and corrosion. The UNC coarse thread design provides superior engagement in metals and composites, reducing stripping risks during high-torque applications. Combined with serrated locking features under the head, it maintains clamp force under dynamic loads, making it ideal for machinery, structural frameworks, and automotive assemblies. The zinc plating adds a protective barrier against moisture and chemicals, ensuring long-term reliability in outdoor or corrosive environments. By integrating high tensile strength and precise Class 2A thread fit, this fastener minimizes downtime and enhances safety in demanding operations.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread size with Class 2A tolerance for consistent fit and performance. It meets IFI 111 specifications aligned with SAE J429 for Grade 5 fasteners, ensuring adherence to industry standards for mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various applications.