S-90602A234 1/2"-13 x 1 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
• Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
• Enhanced installation efficiency through external hex drive design allowing for high torque application
• Increased bearing surface area from the integrated flange, distributing load evenly and preventing surface damage
• Maximum thread utilization with full threading along the entire 1 3/4" length for superior holding power
• Industry-standard compliance meeting IFI 111/SAE J429 specifications for guaranteed quality and interchangeability

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for demanding industrial applications where failure is not an option. The combination of zinc yellow-chromate plated steel construction and Class 3A thread fit addresses common challenges in heavy machinery, structural assemblies, and equipment manufacturing by providing exceptional corrosion protection and precise threading that resists loosening under vibration. The 1/2"-13 UNC coarse thread configuration ensures rapid installation and superior grip in various materials, while the flanged design eliminates the need for separate washers, reducing assembly time and potential points of failure. Engineered to withstand extreme mechanical stresses with its 150,000 psi tensile strength and Rockwell C32 hardness, this fastener is ideal for construction equipment, automotive frames, and industrial machinery where reliability and durability are paramount.

Specification Summary & Compliance

This heavy-duty fastener features precise Class 3A thread fit tolerance for secure mating with Class 2B internal threads, ensuring optimal engagement and vibration resistance. The 1/2"-13 UNC coarse thread configuration follows standardized threading specifications for consistent performance across applications. Manufacturing complies with IFI 111 SAE J429 standards, guaranteeing material quality, dimensional accuracy, and mechanical properties. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection, while the Grade 8 classification confirms adherence to strict industrial strength requirements for reliable performance in critical applications.