S-90129A128 1/2"-13 x 1 1/2" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws
Medium-Strength Grade 5 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
- Enhanced corrosion resistance with black protective coating for extended service life in harsh environments
- Superior load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for heavy-duty applications
- Optimized installation efficiency through external hex drive design and coarse UNC threading for faster assembly
- Improved stability and distribution with integrated flange design that eliminates need for separate washers
- Consistent thread engagement with Class 2A fit and full threading for reliable fastening performance
- Industry-standard compliance meeting SAE J429 mechanical specifications for guaranteed quality
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe industrial usage
Professional Applications & Engineering Value
This Grade 5 hex head screw with black corrosion-resistant coating delivers exceptional performance in demanding industrial environments where exposure to moisture and chemicals would compromise ordinary fasteners. The UNC coarse thread spacing combined with external hex drive enables rapid installation in structural steel connections, heavy machinery assembly, and construction applications. The flanged design provides superior load distribution, reducing point stress concentrations that lead to material fatigue. Engineered with Rockwell C22 hardness and 120,000 psi tensile strength, this fully threaded fastener maintains integrity under extreme vibration and dynamic loading conditions common in manufacturing equipment, transportation systems, and infrastructure projects.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC 1/2"-13 thread specifications. Complies with IFI 111 / SAE J429 mechanical requirements for Grade 5 fasteners. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. Features include: 1 1/2" length, 3/4" head width, 33/64" head height, and 1 5/64" flange diameter in inch measurement system.
