S-91583A151 5/8"-11 x 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 through hot-dipped galvanized steel construction, ensuring long-term reliability in harsh environments
- Superior structural integrity with Grade A325 classification and 120,000 psi tensile strength for heavy-load applications
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster installation and vibration resistance
- Enhanced drive stability featuring external hex drive and 1 1/16" head width for secure tool engagement
- Controlled load distribution through partial threading design with 2 3/4" grip length
- Industry compliance assurance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications
- Environmental regulation compliance with RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
These Grade A325 hex head screws deliver critical performance where structural integrity matters most. The hot-dipped galvanized steel construction provides superior corrosion protection for outdoor infrastructure, industrial equipment, and construction applications exposed to environmental elements. With 120,000 psi tensile strength and Rockwell C19 hardness, these partially threaded fasteners maintain clamping force under extreme loads while the UNC coarse thread pattern ensures rapid installation in structural steel connections. The external hex drive design allows for high-torque application, making them ideal for heavy-duty fastening in bridge construction, building frameworks, and machinery assembly where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (5/8"-11). Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing standards. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements. The 4" length with 1 1/4" thread length and 2 3/4" grip length ensures proper engagement in structural applications.
