S-90409A208 3/4"-16 x 1 3/4" 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 demanding industrial applications
- Superior corrosion resistance and durability through Grade 8 steel construction and Rockwell C32 hardness
- Secure fastening performance with Class 2A thread fit ensuring precise engagement in mating components
- Enhanced installation efficiency through external hex drive design providing reliable torque transmission
- Improved load distribution with integrated flange design reducing surface pressure and preventing loosening
- Reliable fine thread engagement with UNF 3/4"-16 threading offering superior vibration resistance
- Full threading versatility allowing installation through entire length for maximum holding power
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and high-vibration environments. The 150,000 psi tensile strength and Rockwell C32 hardness provide exceptional resistance to mechanical stress and wear, while the UNF fine threading (3/4"-16) ensures secure fastening in applications where vibration resistance is paramount. The integrated flange design eliminates the need for separate washers, distributing clamp load effectively across wider surfaces. Manufactured from high-grade steel with external hex drive, this fastener offers reliable performance in construction equipment, automotive systems, and industrial machinery where maximum durability and precise thread engagement are essential for operational safety and longevity.
Specification Summary & Compliance
This 3/4"-16 UNF hex head screw features Class 2A thread fit tolerances with fully threaded construction and dimensions of 1 3/4" length, 1 1/8" head width, and 1 19/32" flange diameter. Manufactured to IFI 111 and SAE J429 Grade 8 specifications, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for various industrial applications requiring regulatory adherence.
