S-90602A253 1/2"-13 x 2 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 that extends service life in demanding environments
• Enhanced installation efficiency through external hex drive design that allows for high torque application and secure fastening
• Optimized weight distribution with integrated flange that eliminates the need for separate washers and improves joint stability
• Precise thread engagement with Class 2A thread fit ensuring consistent performance and reduced cross-threading risks
• Grade 8 reliability backed by Rockwell C32 hardness for maximum durability in heavy-duty industrial applications
• Versatile partial threading that provides both secure clamping and adjustable positioning capabilities

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional engineering value for industrial applications requiring heavy-duty fastening solutions. The zinc yellow-chromate plated steel construction provides superior corrosion protection in harsh environments, while the 1/2"-13 UNC coarse thread design ensures rapid installation and reliable performance in structural assemblies. The partially threaded configuration combined with the integrated flange offers optimal load distribution, preventing joint loosening under vibration and dynamic loads. These industrial hex screws are specifically engineered to meet the demanding requirements of construction equipment, machinery frames, and structural steel connections where 150,000 psi tensile strength and consistent performance are critical for operational safety and longevity.

Specification Summary & Compliance

This heavy-duty hex bolt features precise Class 2A thread fit with 1/2"-13 UNC coarse threading and 2 3/4" length with minimum thread length of 1 1/4". Manufactured to meet IFI 111 specifications where identified as SAE J429 compliant, ensuring consistent quality and performance standards. The fastener maintains dimensional accuracy with 3/4" head width and 1 5/64" flange diameter, providing reliable interchangeability and compatibility with standard industrial components.