S-90602A274 3/4"-10 x 3 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in the most demanding heavy-duty applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc yellow-chromate plating extends the screw's service life, even in harsh or outdoor environments.
• High-strength Grade 8 classification and Rockwell C32 hardness provide excellent durability and resistance to wear and deformation.
• Integrated flange design eliminates the need for a separate washer, simplifying installation and providing a larger bearing surface for a more secure fit.
• Coarse UNC threading allows for faster installation and better performance in materials where fine threads might strip or cross-thread.
• Partially threaded shank ensures a firm, unthreaded grip length for enhanced clamping force and joint stability.
• External hex drive and hex head offer high torque capability and easy installation with common tools, speeding up assembly processes.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw is a cornerstone for assemblies requiring uncompromising strength and reliability. The zinc yellow-chromate plated steel construction directly addresses the common industrial challenge of corrosion, protecting critical joints in machinery, structural steel frameworks, and transportation equipment. The UNC coarse thread is specifically advantageous for quick assembly in softer materials or where vibration resistance is paramount, preventing loosening under dynamic loads. Its partially threaded and flanged design provides superior clamp load distribution, making it an ideal industrial fastener for high-stress connections in construction, automotive, and manufacturing sectors, where failure is not an option.

Specification Summary & Compliance

This screw adheres to a Class 2A thread fit for consistent assembly and interchangeability. It is manufactured in compliance with IFI 111 / SAE J429 specifications, ensuring it meets recognized industry standards for dimensional accuracy, material properties, and performance. The product conforms to relevant regulations, including RoHS and REACH, for safe and environmentally conscious usage.