S-91583A345 1 1/4"-7 x 5" 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 protection with hot-dipped galvanized steel coating, extending service life in harsh industrial environments
- Exceptional load-bearing capacity with 105,000 PSI tensile strength for heavy-duty structural connections
- Reliable thread engagement through Class 2A thread fit and coarse UNC threading for faster installation and vibration resistance
- Optimized strength-to-weight ratio with Rockwell C19 hardness providing durability without brittleness
- Secure torque transmission via external hex drive and 2" head width for precise installation with standard tools
- Versatile partial threading with 2" threaded section and 3" grip length for controlled clamping in structural applications
- Full regulatory compliance meeting RoHS 3 and REACH environmental standards for global industrial use
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 coating provides superior barrier protection against corrosion in outdoor construction and industrial settings, while the coarse UNC threading ensures rapid installation and maintains integrity under dynamic loads. The partially threaded design creates a controlled shear plane, preventing joint slippage in structural steel applications. Meeting ASME B18.2.6 and ASTM A325 specifications, these high-tensile bolts provide engineers with certified reliability for critical connections in bridges, building frames, and industrial equipment where 105,000 PSI tensile strength is required.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 1 1/4"-7 UNC coarse threading and 5" total length. Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 structural bolt specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety. The hot-dipped galvanized steel construction provides consistent corrosion resistance while maintaining Grade A325 mechanical properties throughout the fastener.
