S-91571A314 3/4"-10 x 7" 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 load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding structural applications
- Superior hardness and durability with Rockwell C19 rating to resist deformation under heavy loads and repeated use
- Optimized thread engagement through UNC coarse threading that provides faster assembly and reduced cross-threading risks
- Secure external hex drive system enabling high-torque installation with standard tools for efficient field assembly
- Precision manufacturing compliance with Class 2A thread fit ensuring consistent mating with nuts and threaded components
- Partial threading design that maximizes unthreaded shank strength while providing sufficient thread length for secure fastening
- Regulatory compliance assurance meeting RoHS 3 and REACH environmental standards for global industrial applications
Professional Applications & Engineering Value
This Grade A325 hex head screw delivers critical structural integrity for heavy construction, bridge building, and industrial machinery assembly. The high-strength steel construction combined with Rockwell C19 hardness provides exceptional resistance to vibrational loosening and fatigue failure in dynamic load environments. The 3/4"-10 UNC coarse thread configuration ensures rapid installation in field conditions while maintaining superior clamping force. With partial threading and substantial 7" length, this fastener optimally distributes stress across the unthreaded shank, preventing thread stripping in high-vibration applications. Engineered to ASME B18.2.6 specifications, these hex head screws provide reliable performance in critical structural connections where failure is not an option.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread specifications. Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features external hex drive with 1 1/4" head width for standard tool compatibility and 5 5/8" grip length for optimal clamping performance.
