S-90602A265 5/8"-11 x 4 1/2" 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 load-bearing capability with Grade 8 classification and 150,000 psi tensile strength for demanding structural applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments
- Optimized torque transmission through external hex drive design and 15/16" head width for secure installation
- Reliable thread engagement with UNC coarse threading and Class 2A fit ensuring consistent fastening performance
- Enhanced stability and load distribution from the integrated flange design, reducing surface pressure
- Versatile partial threading allowing for both clamping and alignment functions in various assembly scenarios
- Industry-standard compliance meeting IFI 111/SAE J429 specifications for guaranteed quality and interchangeability
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver critical performance where failure is not an option. The zinc yellow-chromate plated steel construction provides superior corrosion protection in manufacturing facilities, construction sites, and outdoor equipment. The UNC coarse threading ensures rapid assembly and reduced cross-threading risks, while the external hex drive accommodates high torque requirements. With 150,000 psi tensile strength and Rockwell C32 hardness, these fasteners maintain integrity under extreme vibration and dynamic loads. The flanged design eliminates the need for separate washers, streamlining installation in machinery, structural steel connections, and heavy equipment maintenance.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with 4 1/2" length and 5/8"-11 UNC coarse threads. Threads maintain Class 2A fit tolerance for consistent engagement. Complies with IFI 111 specification where identified as meeting SAE J429 standards for Grade 8 mechanical properties. The zinc yellow-chromate plating provides corrosion resistance while maintaining dimensional accuracy. Partially threaded design with minimum 1 1/2" thread length ensures optimal clamping performance.
