S-91583A601 1/2"-13 x 1 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
- Exceptional corrosion resistance with hot-dipped galvanized steel coating, ideal for outdoor and harsh industrial environments
- Superior tensile strength of 120,000 PSI ensures reliable performance in heavy-duty structural applications
- Fully threaded UNC coarse pattern provides faster installation and enhanced grip in various materials
- Class 2A thread fit guarantees precise, consistent engagement and reduces cross-threading risks
- Grade A325 compliance delivers certified mechanical properties for critical construction and engineering projects
- External hex drive design allows for high-torque application with standard tools, improving installation efficiency
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains
Professional Applications & Engineering Value
These Grade A325 hex head screws are engineered to address the demanding requirements of structural steel connections, bridge construction, and heavy machinery assembly. The hot-dipped galvanized steel construction provides a robust barrier against rust and chemical exposure, significantly extending service life in corrosive environments. With a tensile strength of 120,000 PSI and Rockwell C19 hardness, they prevent joint failure under extreme loads and vibration. The fully threaded UNC coarse pattern ensures maximum thread engagement in steel and concrete, reducing the risk of loosening over time. Ideal for applications where high-strength fastening and long-term durability are non-negotiable, these screws meet rigorous industry standards for safety and performance.
Specification Summary & Compliance
This 1/2"-13 x 1-1/4" hex head screw features Class 2A thread fit for consistent dimensional accuracy and UNC coarse threading per standardized specifications. It complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing standards, ensuring mechanical properties and quality control. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting international environmental and safety regulations for industrial use.
