S-91583A133 5/8"-11 x 1 1/2" 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, extending service life in harsh environments
- Exceptional structural integrity with 120,000 PSI tensile strength for heavy-duty load-bearing applications
- Reliable thread engagement through Class 2A thread fit and UNC coarse threading for easier assembly
- High hardness performance with Rockwell C19 rating to resist deformation under extreme pressure
- Full threading design provides maximum grip length and uniform stress distribution
- External hex drive compatibility enables high-torque installation with standard tools
- Regulatory compliance assurance meeting industrial standards including ASME, ASTM, RoHS 3, and REACH
Professional Applications & Engineering Value
These Grade A325 hex head screws deliver critical performance where structural integrity cannot be compromised. The hot-dipped galvanized steel construction provides a thick, durable barrier against corrosion in outdoor infrastructure, industrial equipment, and construction applications. The 5/8"-11 UNC coarse threading offers superior resistance to vibration loosening while facilitating quicker installation in steel-to-steel connections. With 120,000 PSI tensile strength and Rockwell C19 hardness, these fully threaded fasteners maintain clamp force under dynamic loads, preventing joint failure in critical structural assemblies. The external hex drive design ensures compatibility with standard industrial tools for efficient installation and maintenance.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural bolting applications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety and restricted substances. Features right-hand UNC coarse threads with 1-1/2" length and external hex drive configuration for standardized industrial use.
