S-91236A737 1/2"-13 x 6 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex Head Screws
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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 tensile strength of 60,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Zinc plating provides superior corrosion resistance, extending the screw's service life in various environmental conditions.
- Coarse UNC thread and Class 2A fit enable quick and easy installation, saving time and labor costs during assembly.
- Partially threaded design offers optimal clamping force and vibration resistance in specific joint configurations.
- External hex drive and hex head allow for high-torque application with standard tools, ensuring secure fastening.
- Compliance with ASME B18.2.1 and ASTM A307 guarantees consistent quality and interchangeability for industrial use.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
This 1/2"-13 UNC hex head screw is engineered to address critical challenges in heavy-duty industrial assemblies, where vibration resistance and structural integrity are paramount. The steel construction with Rockwell B69 hardness provides excellent durability, while the coarse thread design prevents cross-threading and ensures reliable engagement in coarse-grained materials. The zinc plated finish combats corrosion, making it suitable for outdoor or humid environments. Its partially threaded shank concentrates clamping force precisely, reducing stress concentration and minimizing loosening under dynamic loads. Ideal for construction, machinery, and structural frameworks, this fastener delivers consistent performance where high tensile strength and compliance with ASME B18.2.1 standards are required.
Specification Summary & Compliance
This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It meets ASME B18.2.1 and ASTM A307 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible procurement.
