S-91583A616 5/8"-11 x 4 1/4" 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
- Superior corrosion protection from hot-dipped galvanized steel coating, ensuring long-term reliability in harsh industrial environments.
- Exceptional structural integrity with Grade A325 classification and 120,000 psi tensile strength for heavy-duty load-bearing applications.
- Optimized thread engagement featuring UNC coarse threading and Class 2A fit for faster installation and reduced cross-threading risks.
- Enhanced driving efficiency with external hex drive and standard head dimensions for secure tool engagement and high torque application.
- Reliable partial threading design providing 3" grip length for precise clamping force distribution in structural connections.
- Consistent performance compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for quality assurance.
- Environmental regulation adherence with RoHS 3 and REACH compliance for sustainable procurement and global market acceptance.
Professional Applications & Engineering Value
Engineered for structural steel connections and heavy machinery assembly, these Grade A325 hex head screws deliver critical performance where vibration resistance and structural integrity are paramount. The hot-dipped galvanized steel construction provides superior barrier protection against corrosion in outdoor or chemically aggressive environments, significantly extending service life. The UNC coarse thread configuration ensures rapid installation in structural steel and plate applications, while the partial threading design concentrates clamping force precisely where needed. With 120,000 psi tensile strength and Rockwell C19 hardness, these fasteners maintain joint integrity under dynamic loads and extreme conditions, making them ideal for bridge construction, structural framing, and industrial equipment where failure is not an option.
Specification Summary & Compliance
These 5/8"-11 hex head screws feature Class 2A thread fit tolerances ensuring proper assembly clearance. Manufacturing complies with ASME B18.2.6 dimensional standards, ASTM A325 material specifications, and ASTM F3125 performance requirements. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for global market acceptance.
