S-91571A274 5/8"-11 x 3" 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 heavy-duty applications
- Superior wear resistance thanks to Rockwell C19 hardness, ensuring extended service life under demanding conditions
- Optimized thread engagement with Class 2A UNC coarse threads providing secure fastening and reduced cross-threading risk
- Enhanced installation efficiency through external hex drive design allowing high torque application with standard tools
- Precise load distribution achieved through partially threaded design with 1 3/4" grip length for optimal clamping force
- Rigorous quality assurance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for consistent performance
- Environmental compliance with RoHS 3 and REACH regulations, ensuring safe use across global markets
Professional Applications & Engineering Value
Engineered for critical structural connections, these Grade A325 hex head screws deliver exceptional performance in construction, infrastructure, and heavy machinery applications. The 5/8"-11 UNC coarse thread configuration ensures rapid installation while maintaining vibration resistance in dynamic load environments. With partial threading and substantial 1 3/4" grip length, these fasteners provide precise clamp load control, preventing joint relaxation under sustained tension. The external hex drive accommodates high torque requirements, making them ideal for structural steel connections, bridge construction, and industrial equipment assembly where 120,000 psi tensile strength and consistent performance are paramount for safety and reliability.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNC coarse thread profile ensuring proper engagement. Complies with ASME B18.2.6 dimensional standards and ASTM A325/ASTM F3125 material specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. The steel construction with Rockwell C19 hardness provides consistent mechanical properties across production batches for reliable performance in standardized applications.
