S-90602A266 5/8"-11 x 5" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 Steel Flanged Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 150,000 psi ensures reliable performance in the most demanding high-stress applications, preventing fastener failure.
- Superior corrosion resistance from the zinc yellow-chromate plating protects the steel core, significantly extending service life in harsh industrial environments.
- High-strength Grade 8 classification and Rockwell C32 hardness provide outstanding durability and resistance to wear and deformation.
- Coarse UNC threads enable faster installation and are less prone to cross-threading and clogging with debris compared to fine threads.
- Integrated flange distributes clamping force over a wider area, eliminating the need for a separate washer and simplifying assembly.
- Class 2A thread fit offers a balance of easy assembly and sufficient engagement for secure, vibration-resistant connections.
- Partial threading allows for unthreaded shank sections to bear shear loads more effectively, enhancing joint integrity.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial fastening, this Grade 8 hex head screw is the solution for applications where failure is not an option. Its Zinc Yellow-Chromate Plated Steel construction combats rust and corrosion in demanding environments like construction, machinery assembly, and structural frameworks. The 5/8"-11 UNC coarse thread ensures rapid and reliable installation, even where alignment is imperfect, reducing assembly time and labor costs. The flanged design provides a stable bearing surface, increasing joint stability and resistance to loosening under dynamic loads and vibration. This combination of high tensile strength and engineered features delivers a dependable, long-lasting connection that minimizes maintenance and downtime.
Specification Summary & Compliance
This fastener features a 5/8"-11 UNC thread with a Class 2A fit for consistent dimensional accuracy. It is manufactured to meet the stringent requirements of SAE J429 for Grade 8 mechanical properties, ensuring compliance with industry standards for high-strength applications.
