S-91583A220 7/8"-9 x 3 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-duty structural and construction applications
- Rockwell C19 hardness provides excellent durability and resistance to wear under high-stress conditions
- Class 2A thread fit with UNC coarse threading allows for easier assembly and reduced risk of cross-threading
- Partially threaded design offers optimal grip length (2 1/4") for secure fastening in structural joints
- External hex drive and hex head enable straightforward installation with standard tools, improving efficiency
- Compliance with ASME, ASTM, RoHS, and REACH standards guarantees quality and safety for industrial and construction projects
Professional Applications & Engineering Value
This Grade A325 hex head screw is engineered to address critical challenges in structural fastening and heavy-duty industrial applications. The hot-dipped galvanized steel construction provides superior protection against rust and environmental degradation, extending service life in bridges, buildings, and machinery. With a coarse UNC thread and Class 2A fit, it ensures quick, secure installation while minimizing the risk of thread damage. The partially threaded design concentrates strength where needed, enhancing joint integrity under dynamic loads. Ideal for construction, infrastructure, and manufacturing, this screw delivers reliable performance where high tensile strength and corrosion resistance are paramount.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit and UNC coarse threading (7/8"-9) for consistent engagement. It complies with ASME B18.2.6, ASTM A325, and ASTM F3125 standards, ensuring dimensional accuracy and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.
