The 2-5331272-3 is a miniature spring socket assembly designed for reliable electrical contact in precision applications. It features a beryllium copper spring with a closed bottom type and tin plate finish on the contact area, providing excellent conductivity and corrosion resistance. The assembly has a maximum pin diameter of 0.070 inches (1.78 mm), a maximum pin length of 3.18 mm (0.125 inches), and an eyelet diameter of 1.27 mm (+0.05/-0.03). The spring tension is maintained within 0.36–0.56 mm (0.014–0.022 inches) to ensure proper contact force. This socket assembly is commonly used in test fixtures, connector applications, and instrumentation where secure, repeatable electrical connections are required, offering superior reliability and long service life.