S-91247A808 5/8"-11 x 3 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
- Exceptional load-bearing capacity with 120,000 psi tensile strength and Rockwell C25 hardness for reliable performance in demanding applications
- Superior corrosion resistance due to zinc plating, extending service life in harsh industrial environments
- Easy and quick installation with UNC coarse threading and external hex drive, reducing assembly time and labor costs
- Secure and precise fit ensured by Class 2A thread fit, minimizing the risk of loosening under vibration
- Optimized strength-to-weight ratio from Grade 5 steel construction, providing durability without unnecessary bulk
- Versatile partial threading allows for effective clamping where full threading isn't required, offering design flexibility
- Compliance with major industry standards including ASME B18.2.1 and SAE J429, ensuring interoperability and reliability
Professional Applications & Engineering Value
This 5/8"-11 UNC hex head screw is engineered to address critical challenges in heavy machinery, structural steel connections, and industrial equipment assembly. The Grade 5 steel construction delivers consistent 120,000 psi tensile strength, preventing fastener failure under extreme loads and vibration. The zinc plating provides essential corrosion protection in environments exposed to moisture or chemicals, significantly reducing maintenance frequency. With coarse threading and external hex drive, installation is swift and secure, even in confined spaces. The partially threaded design ensures optimal clamping force distribution, making it ideal for applications requiring precise joint integrity without compromising on durability or compliance with ASME B18.2.1 and SAE J429 specifications.
Specification Summary & Compliance
This fastener features a Class 2A thread fit for consistent dimensional accuracy and easy assembly. It complies with ASME B18.2.1 and SAE J429 Grade 5 standards, ensuring mechanical properties and manufacturing consistency. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.
