S-91583A612 5/8"-11 x 2 1/4" 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, extending service life in harsh environments
- Exceptional structural integrity with 120,000 psi tensile strength and Rockwell C19 hardness for heavy-load applications
- Reliable thread engagement with Class 2A thread fit and coarse UNC threading for easier installation and vibration resistance
- Optimized load distribution through partial threading design with 1-1/4" thread length and 1" grip length
- Industry-standard compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural applications
- Enhanced installation efficiency with external hex drive and 1-1/16" head width for secure tool engagement
- Environmental responsibility with RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These Grade A325 structural screws deliver critical performance where structural integrity cannot be compromised. The hot-dipped galvanized steel construction provides exceptional corrosion protection for outdoor structures, bridges, and industrial facilities exposed to weather elements. The 5/8"-11 UNC coarse thread configuration ensures rapid installation while maintaining vibration resistance in high-stress applications. With partial threading and precise Class 2A thread fit, these hex head screws provide optimal clamp load distribution, preventing joint failure in steel construction, heavy machinery, and structural framing. The combination of 120,000 psi tensile strength and external hex drive makes them ideal for critical connections requiring both high strength and straightforward installation in construction and industrial settings.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading (5/8"-11). Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 structural fastener specifications. Meets environmental standards including RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant. Thread length: 1-1/4", overall length: 2-1/4", head width: 1-1/16".
