S-91571A264 5/8"-11 x 1 3/4" 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 high-stress applications
- Superior hardness and durability with Rockwell C19 rating to resist wear and deformation under heavy loads
- Optimized partial threading design provides maximum grip strength while reducing weight and material usage
- Precise Class 2A thread fit ensures smooth installation and consistent clamping force in assembly operations
- Heavy-duty external hex drive delivers superior torque transmission and easy installation with standard tools
- Coarse UNC thread pattern enables faster installation and better performance in vibration-prone environments
- Full regulatory compliance meets industry standards including ASME B18.2.6 and environmental regulations RoHS 3/REACH
Professional Applications & Engineering Value
This Grade A325 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where structural integrity is paramount. The ASTM A325 steel construction combined with 120,000 psi tensile strength addresses common failure points in construction, machinery, and structural steel connections. The partial threading with 1 1/4" thread length provides optimal stress distribution, preventing thread stripping while maintaining maximum grip strength. The coarse UNC thread pattern ensures reliable performance in high-vibration environments common in industrial settings, while the external hex drive facilitates quick installation and removal with standard tools, reducing labor time and costs in critical assembly operations.
Specification Summary & Compliance
This 5/8"-11 hex head screw features precise Class 2A thread fit per UNC standards with 1 3/4" overall length and 1 1/4" thread length. Manufactured to meet ASME B18.2.6 specifications and constructed from ASTM A325 steel compliant with ASTM F3125 requirements. The fastener maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications.
