S-91583A211 7/8"-9 x 2 3/4" 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 construction, extending service life in harsh industrial environments
- Exceptional load-bearing capacity with 120,000 psi tensile strength for critical structural applications
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring reliable installation and vibration resistance
- Enhanced torque transmission through external hex drive design for secure fastening in high-stress applications
- Precise load distribution with partially threaded design concentrating strength where needed most
- Industry-standard compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for guaranteed performance
- Environmental regulation adherence with RoHS 3 and REACH compliance for global project acceptance
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 a sacrificial zinc coating that protects against rust and corrosion in outdoor or chemically aggressive environments. With 7/8"-9 UNC coarse threading and partial threading design, these fasteners prevent loosening under dynamic loads while concentrating tensile strength in the critical shank area. The external hex drive allows for high-torque installation, making them ideal for construction applications requiring reliable, high-strength connections that maintain integrity under extreme stress conditions.
Specification Summary & Compliance
These hex head screws feature precise Class 2A thread fit with UNC coarse threading (7/8"-9) and are manufactured to exacting ASME B18.2.6 dimensional standards. The fasteners comply with ASTM A325 and ASTM F3125 specifications for structural bolts, ensuring consistent mechanical properties including 120,000 psi tensile strength and Rockwell C19 hardness. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, making them suitable for regulated industrial markets worldwide.
