S-91571A336 1"-8 x 3 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 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 long-term durability and reduced replacement frequency.
- Optimized load distribution from the partially threaded 1"-8 UNC coarse thread design, providing enhanced grip and vibration resistance.
- Efficient installation and removal with the external hex drive and 1 5/8" head width, allowing for high-torque application with standard tools.
- Precise thread engagement through Class 2A thread fit, minimizing cross-threading risks and ensuring consistent assembly quality.
- Broad industrial compatibility by meeting ASME B18.2.6, ASTM A325, and ASTM F3125 standards, guaranteeing interchangeability and reliability.
- Environmental and regulatory safety with RoHS 3 and REACH compliance, supporting sustainable and safe usage in global markets.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade A325 hex head screw addresses critical challenges in construction, machinery, and structural assemblies. The steel material combined with a 1"-8 UNC coarse thread and partial threading ensures maximum clamping force and resistance to loosening under dynamic loads. Its external hex drive facilitates quick installation in confined spaces, while the 3 1/2" length and 1 3/4" grip length provide ample engagement for thick materials. Ideal for high-strength fastening in bridges, steel frames, and heavy equipment, it reduces maintenance costs and enhances operational safety by withstanding extreme stress and environmental factors.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit and UNC coarse threading per ASME B18.2.6, ensuring dimensional accuracy and reliable performance. Manufactured to ASTM A325 and ASTM F3125 specifications, it guarantees consistency in high-strength applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.
