S-91571A411 1/2"-13 x 6" 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 120,000 psi tensile strength and Grade A325 classification for reliable performance in demanding applications
- Superior wear resistance thanks to Rockwell C19 hardness, ensuring extended service life under heavy loads
- Optimized load distribution through the 5" grip length design, providing enhanced clamping force in structural connections
- Quick installation efficiency with coarse UNC threads and external hex drive, reducing assembly time in industrial settings
- Precise thread engagement with Class 2A thread fit, minimizing cross-threading risks during installation
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for sustainable industrial operations
- Versatile partial threading allowing both threaded and unthreaded sections to accommodate various material thicknesses
Professional Applications & Engineering Value
Engineered for heavy-duty structural applications, these Grade A325 hex head screws deliver critical performance where failure is not an option. The steel construction combined with 1/2"-13 UNC coarse threading provides superior resistance to vibration loosening in construction, bridgework, and industrial machinery. The partially threaded design ensures optimal stress distribution, preventing shear failure at the thread root - a common concern in structural steel connections. With 6" length and 5" grip length, these fasteners accommodate substantial material thicknesses while maintaining ASME B18.2.6 and ASTM A325 compliance for engineering peace of mind. The external hex drive facilitates high-torque installation, making them ideal for projects requiring both speed and reliability.
Specification Summary & Compliance
These structural hex head screws feature precise Class 2A thread fit with 1/2"-13 UNC coarse threads in right-hand direction. Manufacturing adheres to ASME B18.2.6 dimensional standards and ASTM A325/ASTM F3125 material specifications. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring responsible material sourcing and manufacturing processes for global industrial applications.
