S-91571A415 1/2"-13 x 8" 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 wear resistance due to Rockwell C19 hardness, ensuring extended service life under high-stress conditions
- Optimized thread engagement with 1/2"-13 UNC coarse threads providing faster assembly and reduced cross-threading risks
- Secure torque transmission through 7/8" external hex head design enabling high clamping force applications
- Precision-controlled threading with Class 2A fit ensuring consistent mating with standard nuts and components
- Enhanced structural stability through 7" grip length maintaining joint integrity in thick material assemblies
- Full regulatory compliance meeting ASME, ASTM, RoHS 3 and REACH requirements for global project specifications
Professional Applications & Engineering Value
Engineered for critical structural connections in construction and heavy machinery, these Grade A325 hex head screws deliver exceptional performance where failure is not an option. The partially threaded design concentrates strength where needed most, while the coarse UNC thread form ensures rapid installation in steel-to-steel applications. With 120,000 psi tensile strength and Rockwell C19 hardness, these fasteners withstand dynamic loads and vibration in bridge construction, structural steel framing, and industrial equipment assembly. The external hex drive accommodates high-torque installation tools, making them ideal for both field and factory applications requiring ASME B18.2.6 compliance and certified structural performance.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with 1/2"-13 UNC coarse threading and 8" overall length. Complies with ASME B18.2.6 dimensional specifications and meets material requirements of ASTM A325/ASTM F3125 for structural bolts. Environmentally certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant for use in regulated markets and sustainable construction projects.
