S-91583A148 5/8"-11 x 3 1/2" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
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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
- Superior corrosion resistance through hot-dipped galvanized steel coating, ensuring long-term durability in harsh industrial environments
- Exceptional load-bearing capacity with 120,000 psi tensile strength and Rockwell C19 hardness for heavy-duty structural applications
- Reliable thread engagement with Class 2A thread fit and UNC coarse threads for easier assembly and vibration resistance
- Optimized stress distribution through partial threading design, providing enhanced grip strength across the 2¼" grip length
- Industry-standard compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for guaranteed performance
- Easy installation and removal with external hex drive and 1 1/16" head width for standard wrench compatibility
- Environmental regulation compliance with RoHS 3 and REACH standards for safe use across global markets
Professional Applications & Engineering Value
Engineered for structural steel connections and heavy machinery assembly, these Grade A325 hex head screws deliver critical performance where failure is not an option. The hot-dipped galvanized steel construction provides superior protection against corrosion in outdoor and industrial settings, while the 5/8"-11 UNC coarse threads ensure rapid installation and reliable clamping force. The partially threaded design concentrates strength where needed most, preventing thread damage during installation and maintaining structural integrity under dynamic loads. These industrial fasteners are specifically designed to withstand the rigorous demands of construction, bridge work, and heavy equipment manufacturing, offering engineers a trusted solution for critical connections that must endure extreme stress and environmental exposure.
Specification Summary & Compliance
This 3½" length hex head screw features precise Class 2A thread fit with UNC coarse threading (5/8"-11) and partial threading extending 1¼". Manufactured to ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for global market acceptance.
