S-91236A726 1/2"-13 x 3 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 service life of the screw in various industrial environments.
- Coarse UNC threads and Class 2A fit offer easier and faster assembly, minimizing installation time and labor costs.
- Partially threaded design allows for secure clamping over a specific length, ideal for applications requiring precise joint control.
- External hex drive and hex head facilitate straightforward installation and removal with common tools, enhancing maintenance efficiency.
- High hardness (Rockwell B69) improves wear resistance, maintaining thread integrity through repeated use.
- Compliance with ASME B18.2.1 and ASTM A307 guarantees consistent quality and interchangeability, supporting standardized engineering practices.
Professional Applications & Engineering Value
This 1/2"-13 UNC hex head screw is engineered from steel with a zinc-plated finish to address common industrial challenges such as corrosion and mechanical stress. Its coarse thread and partial threading make it ideal for heavy-duty applications in construction, machinery assembly, and structural frameworks, where vibration resistance and ease of installation are critical. The external hex drive ensures quick fastening with standard wrenches, reducing downtime. By meeting rigorous standards, it provides reliable performance in environments requiring high tensile strength and durability, minimizing maintenance needs and enhancing operational safety in B2B settings.
Specification Summary & Compliance
This screw features precise UNC coarse threads with a Class 2A fit for standard tolerance, a length of 3 1/2", and a minimum thread length of 1 1/4". It conforms to ASME B18.2.1 and ASTM A307 manufacturing specifications, ensuring dimensional accuracy and mechanical properties. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial use.
