S-90409A136 3/8"-16 x 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 capacity with 150,000 psi tensile strength for critical structural applications
- Superior wear resistance through Rockwell C32 hardness for extended service life in demanding environments
- Optimized torque transmission via external hex drive design and 9/16" head width for secure installation
- Enhanced stability and load distribution with integrated 13/16" flange eliminating separate washers
- Reliable coarse threading (3/8"-16 UNC) with Class 2A fit for vibration resistance and quick assembly
- Partial threading design providing maximum grip length while maintaining unthreaded shank strength
- Full regulatory compliance meeting SAE J429, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical performance where high tensile strength and vibration resistance are paramount. The steel construction with Rockwell C32 hardness withstands extreme mechanical stress in heavy machinery, construction equipment, and automotive assemblies. The 3/8"-16 UNC coarse thread configuration prevents cross-threading during rapid assembly while maintaining Class 2A thread fit precision. The integrated flange design distributes clamping force evenly, eliminating the need for separate washers and reducing installation time. Partial threading ensures maximum thread engagement while the unthreaded shank provides superior shear strength for structural connections subject to dynamic loads.
Specification Summary & Compliance
Manufactured to IFI 111 specifications meeting SAE J429 Grade 8 requirements with 150,000 psi tensile strength. Features 3/8"-16 UNC coarse threads with Class 2A thread fit tolerance for precise engagement. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Dimensions include 2" length, 9/16" head width, and 13/16" flange diameter with partial threading over minimum 1" thread length.
