S-91583A628 1"-8 x 2 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
- Superior corrosion resistance from hot-dipped galvanized steel coating, ensuring long-term reliability in harsh environments.
- Exceptional structural integrity with 120,000 psi tensile strength and Rockwell C19 hardness for heavy-duty applications.
- Reliable fastening performance due to Class 2A thread fit and coarse UNC threading, minimizing loosening under vibration.
- Easy installation and removal with external hex drive and hex head design, compatible with standard tools.
- Optimized load distribution through partially threaded design, providing strong grip length for structural connections.
- Compliance with industry standards including ASME B18.2.6, ASTM A325, and ASTM F3125, ensuring consistent quality.
- Environmental and safety compliance with RoHS 3 and REACH regulations, suitable for global industrial use.
Professional Applications & Engineering Value
These Grade A325 heavy-duty hex head screws are engineered to address critical structural fastening challenges in construction, bridge building, and heavy machinery assembly. The hot-dipped galvanized steel material provides robust protection against corrosion, extending service life in outdoor or corrosive environments. With a 1"-8 UNC coarse thread and partial threading, the screw ensures secure clamping force and reduces stress concentration, preventing joint failure under dynamic loads. The external hex drive allows for high-torque installation, making them ideal for applications requiring precise tension control and vibration resistance, such as steel frame connections and industrial equipment mounting.
Specification Summary & Compliance
This screw features a 1"-8 UNC coarse thread with Class 2A thread fit for consistent engagement and dimensional accuracy. It complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, ensuring adherence to mechanical and manufacturing standards. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety requirements for industrial use.
