S-92316A812 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 strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength
- Superior corrosion resistance provided by the black-phosphate steel coating, extending service life
- Enhanced load distribution and vibration resistance from the integrated flange design
- Reliable and secure fastening ensured by the Class 2A thread fit and coarse UNC thread pattern
- Easy installation with standard tools thanks to the external hex drive and 15/16" head width
- Optimized for partial threading applications with a 1 1/2" minimum thread length on a 4 1/2" shank
- Compliance with major industrial and environmental standards including SAE J429, RoHS 3, and REACH
Professional Applications & Engineering Value
This Grade 8 Hex Head Screw is engineered for heavy-duty industrial applications where failure is not an option. The black-phosphate steel construction provides a robust barrier against corrosion, making it ideal for machinery, structural steel connections, and automotive assemblies exposed to harsh environments. Its 5/8"-11 UNC coarse thread and Class 2A thread fit ensure rapid assembly and reliable performance in high-vibration settings, while the flanged head eliminates the need for a separate washer, distributing clamp load effectively and preventing surface damage. With a Rockwell C32 hardness and 150,000 psi tensile strength, this partially threaded screw delivers the durability and precision required by engineers and procurement specialists for critical fastening tasks.
Specification Summary & Compliance
This fastener features a 5/8"-11 UNC coarse thread with Class 2A thread fit and partial threading (minimum 1 1/2"). It meets IFI 111 / SAE J429 specifications for Grade 8 mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
