S-91571A412 1/2"-13 x 6 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 structural integrity with Grade A325 classification and 120,000 psi tensile strength for reliable performance in heavy-load applications
- Superior corrosion resistance and durability through high-grade steel construction with Rockwell C19 hardness rating
- Optimized load distribution via partially threaded design with 5½" grip length ensuring maximum clamping force
- Quick installation and removal with standard 7/8" external hex head compatible with common industrial tools
- Precise thread engagement with Class 2A UNC coarse threads providing secure fastening in structural connections
- Regulatory compliance assurance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for quality verification
- Environmental responsibility through RoHS 3 and REACH compliance for sustainable industrial operations
Professional Applications & Engineering Value
Engineered for structural steel connections and heavy construction applications, these Grade A325 hex head screws deliver critical performance where failure is not an option. The high-strength steel composition combined with Rockwell C19 hardness provides exceptional resistance to shear and tensile stresses in bridge construction, building frameworks, and industrial machinery. The partially threaded design with precise 1/2"-13 UNC coarse threads ensures optimal stress distribution along the 5½" grip length, preventing joint loosening under dynamic loads. The external hex drive configuration allows for high-torque installation using standard impact wrenches, significantly reducing assembly time in industrial construction projects while maintaining consistent clamping force.
Specification Summary & Compliance
This heavy-duty hex head screw features precise Class 2A thread fit with 1/2"-13 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, ensuring dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for global industrial applications.
