S-90306A348 1/2"-13 x 3" Left-Hand Threaded 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing maintenance costs
• Superior tensile strength of 70,000 psi ensures reliable performance under high-stress conditions, preventing joint failure
• Precise Class 2A thread fit guarantees smooth assembly and secure fastening, minimizing the risk of cross-threading
• Left-hand threading provides a specialized solution for applications where standard right-hand threads would loosen under rotational forces
• Full threading along the 3-inch length offers maximum grip and adjustability in a wide range of material thicknesses
• External hex drive and hex head design allow for high-torque installation with common tools, speeding up assembly processes
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptability for your projects

Professional Applications & Engineering Value

This 1/2"-13 UNC left-hand thread hex screw is engineered to solve critical fastening challenges in demanding industrial settings. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it perfect for marine, chemical processing, and outdoor equipment where exposure to moisture is a constant concern. The coarse UNC thread and left-hand direction are specifically designed for applications subject to counter-clockwise rotational forces, such as certain types of machinery, grinders, or blower fans, preventing unintended loosening. Its fully threaded design and external hex drive facilitate quick and secure installation in heavy-duty assemblies, ensuring long-term reliability and reducing downtime for maintenance. This combination of material properties and thread specifications delivers a robust left-hand fastening solution that enhances the safety and durability of your engineering projects.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with a Class 2A thread fit, ensuring dimensional accuracy and interchangeability. 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 fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety standards for industrial use.