The 105-2204-201 is a vertical test jack with insulated formed contact designed for reliable electrical testing and measurement applications. It features a beryllium copper contact per QQ-C-533 with silver plating finish, a nylon 6/6 body per ASTM D4066, and is rated for 5 amps continuous current with a minimum breakdown voltage of 3500 Vrms. The contact resistance is specified at 0.010 ohms maximum for the silver-plated version, and the jack accommodates standard tip plugs with 0.080 inch (2.00 mm) diameter. The spring-loaded lead holds securely in the board while protecting the contact from flux and solder, and the nylon body is UL approved for self-extinguishing properties. This design makes it ideal for test fixtures, measurement equipment, and laboratory applications where durability and electrical performance are essential.