S-95966A643 2-56 x 1/2" Captive Panel Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and long-term reliability.
• Superior holding power from a high 70,000 psi tensile strength, ensuring secure and vibration-resistant panel assemblies.
• Precise and reliable fastening with Class 3A thread fit, providing tighter tolerances for consistent performance in critical applications.
• Easy installation and removal using the 5/64" hex socket drive, allowing for efficient assembly with standard tools in confined spaces.
• Optimized for panel retention through its partially threaded design, preventing loosening and maintaining alignment in electronic and machinery enclosures.
• Wide compatibility with 2-56 UNC coarse threads, offering quick engagement and robust performance in various materials.
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility for international projects.

Professional Applications & Engineering Value

This 18-8 stainless steel captive panel screw is engineered to address common challenges in industrial assembly, such as vibration-induced loosening and corrosion in demanding environments. Its UNC coarse threads and Class 3A fit ensure rapid, secure fastening in metal and composite panels, reducing installation time while maintaining integrity under stress. The partially threaded shank and smooth socket head design prevent over-torquing and provide reliable retention in electronic chassis, communication equipment, and machinery panels. With a high tensile strength of 70,000 psi, it offers durability for repetitive access and harsh conditions, making it a trusted choice for B2B procurement in sectors like aerospace, telecommunications, and automation where precision and compliance are critical.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A fit for precise dimensional accuracy, featuring a thread size of 2-56, coarse spacing, and a length of 1/2" with a tolerance of -0.03" to 0". Manufactured from 18-8 stainless steel with a 5/64" hex drive and partially threaded design, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial applications.