S-91583A214 7/8"-9 x 3" 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, ensuring long-term reliability in harsh environments
- High tensile strength of 120,000 PSI provides superior load-bearing capacity for demanding structural applications
- Rockwell C19 hardness offers excellent wear resistance and durability under repeated stress
- Coarse UNC threading with Class 2A fit ensures easy installation and secure fastening in various materials
- Partially threaded design with 1-1/2" grip length allows for precise clamping force distribution in joint connections
- External hex drive configuration enables high-torque installation using standard tools for efficient assembly
- Compliance with multiple industry standards including ASME B18.2.6, ASTM A325 and ASTM F3125 guarantees consistent quality and performance
Professional Applications & Engineering Value
These Grade A325 hex head screws deliver critical engineering solutions for structural steel connections and heavy-duty industrial applications. The hot-dipped galvanized steel construction provides superior protection against environmental degradation, significantly extending service life in outdoor and corrosive environments. The 7/8"-9 UNC coarse thread configuration ensures reliable engagement in structural steel, while the partial threading design concentrates clamping force precisely where needed. With 120,000 PSI tensile strength and Rockwell C19 hardness, these external hex drive fasteners maintain structural integrity under extreme loads, making them ideal for construction projects, bridge work, and industrial machinery where failure is not an option.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with 7/8"-9 UNC coarse thread specifications. These hex head screws comply with ASME B18.2.6, ASTM A325, and ASTM F3125 standards for dimensional accuracy and mechanical properties. The fasteners are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial use.
