S-91247A722 1/2"-13 x 2 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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
- High tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending service life in various industrial environments.
- Grade 5 steel construction with Rockwell C25 hardness offers superior durability and resistance to wear.
- UNC coarse threading and Class 2A thread fit enable quick, secure assembly and reduce cross-threading risks.
- Partially threaded design allows for precise clamping force control, ideal for applications requiring specific grip ranges.
- External hex drive with 3/4" head width facilitates easy installation and removal with standard tools.
- Compliance with ASME B18.2.1 and SAE J429 ensures consistent quality and interoperability in mechanical assemblies.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address critical challenges in heavy-duty industrial applications, such as machinery assembly, structural frameworks, and automotive components. The zinc plated finish combats corrosion in harsh environments, while the UNC coarse thread and Class 2A thread fit provide reliable engagement and vibration resistance. With a tensile strength of 120,000 psi and Rockwell C25 hardness, it withstands high stress and repetitive loads, reducing maintenance needs. The partially threaded design ensures optimal clamping where full threading isn't required, making it a versatile choice for engineers seeking durability and compliance with ASME B18.2.1 standards.
Specification Summary & Compliance
This fastener features a 1/2"-13 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, and a length of 2 1/2" with a minimum thread length of 1 1/4". It is manufactured in accordance with ASME B18.2.1 and SAE J429 specifications, ensuring consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in global supply chains.
