S-91247A806 5/8"-11 x 3" 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
- Exceptional tensile strength of 120,000 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 environmental conditions.
- Grade 5 classification and Rockwell C25 hardness offer a balance of strength and toughness, ideal for heavy-duty industrial use.
- Coarse UNC threads with Class 2A fit enable faster assembly and better vibration resistance compared to fine threads.
- Partially threaded design allows for precise clamping force distribution, minimizing material stress in joined components.
- External hex drive and hex head facilitate easy installation and removal with standard tools, improving workflow efficiency.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability in mechanical systems.
Professional Applications & Engineering Value
This 5/8"-11 UNC Grade 5 hex head screw is engineered to address critical fastening challenges in heavy-duty industrial applications, such as machinery assembly, structural frameworks, and automotive components. The zinc plated steel construction combats corrosion, ensuring longevity in harsh environments, while the coarse thread design enhances grip and resists loosening under vibration. With a tensile strength of 120,000 psi and Rockwell C25 hardness, it provides reliable clamping force without compromising durability, making it a top choice for engineers seeking high-strength, partially threaded solutions that meet rigorous ASME and SAE standards for safety and performance.
Specification Summary & Compliance
This screw features a 3" length with a minimum thread length of 1 1/2", Class 2A thread fit for precise tolerances, and UNC coarse threading per inch system specifications. It complies with ASME B18.2.1 and SAE J429 standards, ensuring dimensional accuracy and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations in global supply chains.
