S-91571A210 1/2"-13 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 certification and 120,000 psi tensile strength for reliable performance in demanding applications
- Superior wear resistance thanks to Rockwell C19 hardness, ensuring extended service life in high-stress environments
- Optimized load distribution through the 4" grip length and partially threaded design, minimizing stress concentration points
- Quick installation and removal with external hex drive and 7/8" head width, compatible with standard tools
- Secure fastening in various materials using 1/2"-13 UNC coarse threads that resist loosening under vibration
- Precision manufacturing with Class 2A thread fit ensuring consistent performance and easy assembly
- Regulatory compliance assurance meeting ASME, ASTM, RoHS 3, and REACH standards for global project acceptance
Professional Applications & Engineering Value
Engineered for structural connections and heavy-duty construction, these Grade A325 hex head screws address critical engineering challenges in industrial settings. The steel construction combined with UNC coarse threading provides superior resistance to vibrational loosening, making them ideal for structural steel assemblies, bridge construction, and heavy machinery applications. The partially threaded design ensures that the unthreaded shank bears against connected materials, preventing joint slippage under dynamic loads. With 5" length and external hex drive, these fasteners offer optimal clamping force distribution while maintaining accessibility in confined spaces, solving common issues of joint failure in high-stress environments.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with 1/2"-13 UNC coarse threads and 1" thread length. Fully compliant with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural fasteners. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in international markets. The external hex drive configuration and right-hand thread direction follow industry-standard installation practices.
