S-92323A537 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 rated at 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 faster installation and easier alignment, saving valuable assembly time.
• Serrated locking flange prevents loosening under vibration, maintaining secure connections without additional locking components.
• Fully threaded design offers consistent holding power along the entire length, providing versatile fastening solutions.
• Grade 5 classification guarantees consistent mechanical properties and reliability for demanding engineering applications.
• External hex drive enables high-torque installation with standard tools, ensuring tight and secure fastening.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw delivers outstanding performance in demanding industrial settings where vibration resistance and structural integrity are critical. The coarse UNC thread pattern with Class 2A fit ensures quick installation while maintaining precise tolerances, significantly reducing assembly time in production environments. The serrated locking flange provides superior anti-vibration properties, eliminating the need for separate lock washers in machinery, automotive assemblies, and structural frameworks. With its fully threaded design and external hex drive, this fastener offers exceptional clamping force distribution and compatibility with standard industrial tools, making it ideal for heavy equipment manufacturing, construction projects, and maintenance applications where reliability cannot be compromised.

Specification Summary & Compliance

This 5/16"-18 UNC hex head screw features Class 2A thread fit per standard inch system requirements, ensuring proper clearance and engagement. Manufacturing complies with SAE J429 specifications (IFI 111) for Grade 5 fasteners, guaranteeing consistent mechanical properties including Rockwell C22 hardness. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, making it suitable for regulated industrial applications worldwide.