S-91583A193 3/4"-10 x 4 1/4" 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 with hot-dipped galvanized steel coating, extending service life in harsh environments
- Exceptional structural integrity with Grade A325 classification and 120,000 psi tensile strength for heavy-duty applications
- Reliable thread engagement through UNC coarse threading and Class 2A fit, ensuring secure fastening in construction projects
- Optimized load distribution with partially threaded design and 2 7/8" grip length, minimizing stress concentration points
- Enhanced installation efficiency using standard external hex drive and 1 1/4" head width for easy tool access
- Consistent performance compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for engineering reliability
- Environmental responsibility through RoHS 3 and REACH compliance, ensuring workplace and regulatory safety
Professional Applications & Engineering Value
Engineered for structural steel connections and heavy construction projects, 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 barrier that withstands environmental exposure in bridges, industrial facilities, and outdoor structures. With 120,000 psi tensile strength and Rockwell C19 hardness, these partially threaded bolts maintain clamp force under dynamic loads while the UNC coarse threads prevent cross-threading during installation. The external hex drive design allows for high-torque application using standard tools, making them ideal for structural fastening where accessibility may be limited.
Specification Summary & Compliance
These 3/4"-10 hex head screws feature Class 2A thread fit per UNC standards with precise 4 1/4" overall length and 1 3/8" thread length. Manufacturing complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance management for industrial applications.
