S-91571A340 1"-8 x 5" 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 structural integrity with Grade A325 classification and 120,000 psi tensile strength for reliable performance in demanding applications
- Superior wear resistance due to Rockwell C19 hardness, ensuring extended service life under heavy loads
- Optimized load distribution through 3 1/4" grip length and partially threaded design for enhanced joint stability
- Easy installation and removal with external hex drive and 1 5/8" head width providing excellent tool engagement
- Secure fastening in various materials using 1"-8 UNC coarse threads that resist loosening from vibrations
- Full regulatory compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for quality assurance
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable procurement
Professional Applications & Engineering Value
These Grade A325 hex head screws deliver critical engineering solutions for structural steel connections, heavy machinery assembly, and construction applications where failure is not an option. The steel construction combined with Class 2A thread fit ensures precise installation and consistent clamping force across joints. The partially threaded design concentrates strength where needed most, while the coarse UNC threading provides excellent engagement in structural steel and other demanding substrates. These industrial hex screws solve common challenges of vibration-induced loosening and material fatigue through their 120,000 psi tensile strength and controlled hardness profile, making them ideal for critical structural applications requiring predictable, long-term performance.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and 1"-8 UNC coarse threading ensuring proper engagement and installation consistency. These hex head screws strictly adhere to ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing specifications. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, confirming responsible manufacturing practices for global industrial applications.
