S-90602A219 5/16"-18 x 1 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
- Maximum load-bearing capability with Grade 8 classification and 150,000 PSI tensile strength for critical structural applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments
- Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant connections
- Enhanced stability and load distribution through the integrated flange design, reducing surface pressure
- Optimized for heavy-duty use with Rockwell C32 hardness maintaining structural integrity under extreme conditions
- Quick installation and removal with external hex drive and UNC coarse thread pattern
- Industry-standard compliance meeting IFI 111/SAE J429 specifications for quality assurance
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Grade 8 hex head screws deliver exceptional performance in heavy machinery, construction equipment, and structural assemblies. The zinc yellow-chromate plated steel construction provides superior protection against corrosion and environmental degradation, while the partially threaded UNC coarse thread design ensures optimal clamping force distribution. The external hex drive facilitates efficient installation in confined spaces, and the flanged design eliminates the need for separate washers, reducing assembly time and component count. These high-strength fasteners maintain their mechanical properties under extreme vibration and load conditions, making them ideal for critical connections where failure is not an option.
Specification Summary & Compliance
This 5/16"-18 UNC hex head screw features Class 3A thread fit for precision tolerance and meets IFI 111/SAE J429 specifications. The fastener maintains dimensional accuracy with 1-1/2" length and 7/8" minimum thread length, ensuring consistent performance across applications. Manufacturing complies with industry standards for heavy-duty industrial fasteners, providing reliable mechanical properties including 150,000 PSI tensile strength and Rockwell C32 hardness.
