S-91412A520 1/2"-13 x 2" Stainless Steel Thread-Locking Hex Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking: Nylon patch thread locker maintains secure fastening in high-vibration environments, eliminating the need for separate locking components.
• Superior corrosion resistance: Made from 18-8 Stainless Steel for excellent durability in harsh or corrosive industrial settings.
• High-strength performance: With a tensile strength of 70,000 psi and Rockwell B70 hardness, this screw reliably handles heavy-duty mechanical loads.
• Secure and efficient installation: The external hex drive and 3/4" head width provide a positive grip for high-torque application with standard tools.
• Optimized thread engagement: Coarse UNC threads with a Class 2A fit ensure quick assembly and reliable holding power in a variety of materials.
• Wide temperature tolerance: The nylon patch locking function remains effective from -55° to 250° F, suitable for diverse operating conditions.
• Versatile partial threading: The 2" length with a 1-1/4" minimum threaded section offers flexibility for applications requiring unthreaded shank strength.

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered to solve critical fastening challenges in demanding industrial environments. The 18-8 Stainless Steel construction provides inherent resistance to rust and corrosion, making it ideal for outdoor equipment, marine applications, and chemical processing plants where environmental durability is paramount. The integrated nylon patch thread locker is a key engineering feature, preventing loosening under dynamic loads and vibration in machinery, automotive assemblies, and structural frameworks. The coarse UNC thread and Class 2A fit facilitate faster installation and reduce the risk of cross-threading in production lines, while the partial threading offers a strong, unthreaded shoulder for precise clamping. This combination of a high tensile strength rating and secure locking mechanism delivers long-term reliability, reducing maintenance needs and downtime in heavy-duty industrial applications.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with a Class 2A thread fit for standard dimensional accuracy and reliable engagement. It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B70 and a tensile strength of 70,000 psi. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for industrial use.