S-91583A609 1/2"-13 x 4 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 corrosion resistance with hot-dipped galvanized steel coating, ideal for outdoor and harsh industrial environments.
- High tensile strength of 120,000 psi ensures reliable performance in heavy structural applications without failure.
- Rockwell C19 hardness provides excellent durability and wear resistance under high-stress conditions.
- Partially threaded design allows for secure clamping in structural joints, reducing vibration loosening.
- Class 2A thread fit with UNC coarse threading offers easy assembly and consistent engagement in various materials.
- External hex drive and 7/8" head width enable quick installation with standard tools, saving labor time.
- Compliance with ASME B18.2.6, ASTM A325, and ASTM F3125 guarantees quality and interchangeability in professional projects.
Professional Applications & Engineering Value
This Grade A325 hex head screw is engineered for demanding structural applications, such as steel framing, bridge construction, and heavy machinery assembly. The hot-dipped galvanized steel material provides a robust barrier against rust and environmental degradation, extending service life in corrosive settings. With a 1/2"-13 UNC coarse thread and partial threading, it ensures optimal grip length and resistance to dynamic loads, preventing joint failure in high-vibration environments. The external hex drive facilitates efficient installation, reducing downtime in industrial and construction projects while maintaining compliance with key standards for safety and reliability.
Specification Summary & Compliance
This fastener features a 1/2"-13 UNC coarse thread with Class 2A fit for precise dimensional accuracy, ensuring consistent performance. It meets ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural bolts, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial use.
