S-91247A720 1/2"-13 x 2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior tensile strength of 120,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending service life in harsh industrial environments and reducing maintenance costs.
- Grade 5 classification and Rockwell C25 hardness deliver consistent durability and resistance to wear under heavy loads.
- Coarse UNC threads with Class 2A fit enable quick and secure installation, minimizing assembly time and improving joint integrity.
- Partially threaded design offers optimal clamping force distribution, preventing loosening in dynamic applications.
- External hex drive and hex head allow for high-torque application with standard tools, ensuring tight fastening in confined spaces.
- Compliance with ASME, SAE, RoHS, and REACH standards guarantees quality, safety, and environmental responsibility for global supply chains.
Professional Applications & Engineering Value
This Grade 5 hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. Made from high-strength steel with a zinc-plated finish, it resists rust and wear, making it ideal for heavy machinery, construction frameworks, and automotive assemblies. The 1/2"-13 UNC coarse thread and Class 2A fit ensure precise engagement, reducing the risk of cross-threading and enhancing load distribution. Its partially threaded shank concentrates clamping force where needed, preventing joint failure in applications like structural steel connections and equipment mounting. By meeting ASME B18.2.1 and SAE J429 standards, it provides reliable performance in industrial fastening scenarios, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. It complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring high tensile strength and hardness. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmental and safety standards in industrial use.
