S-91583A196 3/4"-10 x 4 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
- Exceptional corrosion resistance from hot-dipped galvanized steel coating, ensuring long-term reliability in harsh environments
- High-strength structural integrity with 120,000 psi tensile strength and Grade A325 certification for demanding applications
- Secure fastening performance through Class 2A thread fit and UNC coarse threading, reducing cross-threading risks
- Optimized load distribution with partial threading design, enhancing grip length effectiveness
- Superior surface durability with Rockwell C19 hardness, resisting wear during installation and service
- Easy installation and removal using standard external hex drive tools, saving labor time
- Full regulatory compliance with RoHS 3 and REACH, meeting international environmental and safety standards
Professional Applications & Engineering Value
Engineered for structural steel connections, these Grade A325 hex head screws deliver critical performance in construction, bridgework, and heavy machinery assembly. The hot-dipped galvanized steel construction provides a robust barrier against rust and chemical exposure, significantly extending service life in outdoor or corrosive environments. With coarse UNC threads and partial threading, the design ensures rapid installation while maintaining superior clamping force across the 3 1/8" grip length. This combination addresses common industrial challenges—including vibration loosening, material fatigue, and environmental degradation—making these heavy-duty hex screws ideal for permanent, high-load structural fastening where reliability cannot be compromised.
Specification Summary & Compliance
This 3/4"-10 hex head screw maintains precise Class 2A thread fit tolerances per UNC standards, ensuring consistent engagement. Manufacturing adheres to ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and regulatory acceptance in global markets.
