S-90121A716 1/2"-13 x 1 1/2" ASME B18.2.1 Stainless Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh environments and reducing long-term replacement costs.
• Exceptional mechanical strength with a 70,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable performance under high-stress conditions.
• Secure and efficient installation with an external hex drive and 3/4" head width, providing excellent torque transfer and preventing tool slippage.
• Optimized thread engagement with a 1/2"-13 UNC coarse thread and Class 2A fit, enabling faster assembly and robust connections in a wide range of materials.
• Full-length threading along the 1-1/2" length offers maximum grip and adjustability, enhancing the screw's versatility in various applications.
• Compliance with industry standards including ASME B18.2.1 and RoHS 3, guaranteeing dimensional accuracy, safety, and environmental responsibility.
• Right-hand thread direction ensures standard, intuitive installation, streamlining assembly processes and reducing errors.

Professional Applications & Engineering Value

This 1/2"-13 UNC Hex Head Screw is engineered to solve critical challenges in demanding industrial applications. The core of its value lies in the 18-8 Stainless Steel material, which provides excellent resistance to oxidation and corrosion, significantly extending service life in environments exposed to moisture, chemicals, and varying temperatures. The combination of a coarse UNC thread and a Class 2A thread fit is specifically designed for rapid, secure fastening in softer materials or where vibration resistance is paramount, preventing loosening over time. The external hex drive and substantial head size allow for high torque application, making it a reliable choice for heavy-duty machinery, structural frameworks, and construction projects where joint integrity cannot be compromised. Its full threading ensures that the entire shank contributes to clamping force, providing a dependable and long-lasting mechanical connection.

Specification Summary & Compliance

This screw adheres to a Class 2A thread fit for consistent, free-spinning assembly. It is manufactured to the dimensional requirements of the ASME B18.2.1 standard and is confirmed to be RoHS 3 (2015/863/EU) Compliant, ensuring it is free of specific hazardous substances. The thread specification is 1/2"-13 UNC (Unified Coarse).