S-91571A254 1/2"-13 x 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 120,000 psi tensile strength and Grade A325 classification, ensuring reliable performance in demanding applications.
- Superior durability and wear resistance thanks to Rockwell C19 hardness, extending service life under high-stress conditions.
- Optimized for quick, secure installation featuring UNC coarse threading and Class 2A fit, reducing assembly time and preventing cross-threading.
- Robust external hex drive design allows for high torque application, minimizing tool slippage and ensuring tight fastening.
- Partially threaded shank provides enhanced grip length for superior clamping force in structural steel connections.
- Compliant with major industry standards including ASME B18.2.6, ASTM A325, and ASTM F3125, guaranteeing consistent quality and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.
Professional Applications & Engineering Value
Engineered for structural steel connections in construction, bridges, and heavy machinery, these Grade A325 hex head screws address critical challenges like vibration loosening and joint failure. The high-strength steel material combined with UNC coarse threads ensures rapid installation and maintains clamp load under dynamic loads. The partially threaded design concentrates stress away from the thread roots, enhancing fatigue resistance in structural bolting applications. With external hex drive compatibility, they facilitate efficient assembly using standard tools, reducing labor costs and improving project timelines while meeting rigorous ASTM A325 and F3125 specifications.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC 1/2"-13 coarse threading per ASME standards, ensuring dimensional accuracy and compatibility. It complies with ASME B18.2.6 for dimensional requirements, ASTM A325 for chemical and mechanical properties, and ASTM F3125 for structural bolt qualifications. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations.
