S-91571A408 1/2"-13 x 4 3/4" 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, ideal for structural and heavy machinery applications.
- Superior durability and wear resistance due to Rockwell C19 hardness, ensuring long service life under stress.
- Reliable fastening in coarse materials with 1/2"-13 UNC coarse threading, reducing cross-threading risks.
- Optimized grip and shear strength from the 3 3/4" grip length and partially threaded design for secure joint integrity.
- Easy installation and removal using standard tools with the external hex drive and 7/8" head width.
- Compliance with rigorous industry standards including ASME B18.2.6 and ASTM A325, ensuring consistent quality and safety.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade A325 hex head screw addresses critical challenges in construction and machinery assembly. Its high-strength steel composition and Rockwell C19 hardness provide resistance to deformation and fatigue, essential for dynamic loads. The 1/2"-13 UNC coarse thread ensures quick installation and robust holding power in brittle or coarse materials, minimizing failure risks. Partially threaded design concentrates strength at the shank, enhancing shear resistance in structural connections. Ideal for steel framing, bridge construction, and heavy equipment, it delivers reliable performance where safety and durability are paramount, supported by adherence to ASME B18.2.6 and other key standards.
Specification Summary & Compliance
This screw features precise Class 2A thread fit for consistent engagement and UNC coarse threading per inch standards. It complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, ensuring dimensional accuracy and mechanical properties. Environmental adherence includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances. Dimensions include a 4 3/4" length and 1" thread length, tailored for demanding fastening tasks.
