S-90409A180 5/8"-11 x 3 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 Load-Bearing Capability – Grade 8 steel construction and 150,000 psi tensile strength ensure reliable performance under extreme mechanical stress.
- Superior Wear & Corrosion Resistance – Rockwell C32 hardness provides excellent durability and longevity in demanding environments.
- Secure & Stable Fastening – Integrated flange design distributes load evenly, reducing the risk of loosening and surface damage.
- Easy Installation & Removal – External hex drive and coarse UNC threading allow for quick assembly and disassembly with standard tools.
- Precision Thread Fit – Class 2A thread tolerance ensures consistent, reliable engagement without cross-threading issues.
- Versatile Industrial Use – Partially threaded shank offers flexibility for applications requiring both clamped and unthreaded sections.
- Compliant & Traceable Quality – Meets IFI 111/SAE J429 standards and RoHS 3/REACH regulations for safe, industry-approved usage.
Professional Applications & Engineering Value
This Grade 8 steel hex head screw is engineered to address critical challenges in heavy machinery, structural assemblies, and construction projects. The 5/8"-11 UNC coarse thread and Class 2A fit provide excellent vibration resistance and ease of alignment, reducing installation time and improving joint integrity. The flanged head eliminates the need for separate washers, offering a larger bearing surface that prevents embedding into softer materials. With a 150,000 psi tensile strength and Rockwell C32 hardness, it withstands dynamic loads and harsh conditions, making it ideal for industrial equipment, automotive frames, and infrastructure where reliability is non-negotiable.
Specification Summary & Compliance
This fastener adheres to IFI 111 / SAE J429 specifications, with Class 2A thread tolerance ensuring dimensional accuracy. It features a 3 1/2" length, 5/8"-11 UNC coarse thread, and partial threading up to a minimum of 1 1/2". The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safe use across global industrial markets.
