S-91571A332 1"-8 x 2 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
- Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding structural applications
- Superior hardness and durability with Rockwell C19 rating to resist wear and deformation under high stress
- Optimized coarse UNC threading for faster installation and reduced cross-threading risks in industrial settings
- Precise Class 2A thread fit ensuring consistent engagement and vibration resistance in assembled structures
- Heavy-duty steel construction providing long-term corrosion resistance and structural integrity
- External hex drive compatibility for standard tooling and secure torque application during installation
- Partial threading design offering both gripping strength and unthreaded shank stability in joint connections
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 1"-8 UNC coarse thread configuration enables rapid installation in thick materials while maintaining vibration resistance in dynamic environments. Manufactured from high-strength steel with Rockwell C19 hardness, these fasteners withstand extreme loads without compromising thread integrity. The partially threaded design provides optimal clamp force distribution, making them ideal for structural bolting applications in construction, bridge building, and industrial equipment where precise grip length control is essential for joint performance.
Specification Summary & Compliance
This Grade A325 hex head screw features 1"-8 UNC coarse threading with Class 2A thread fit tolerance for precise engagement. The fastener meets rigorous industry standards including ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for dimensional accuracy and mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety in global industrial applications.
