105-0857-001 is a vertical test jack designed for test point applications in electronic testing and measurement systems. The jack features a beryllium copper contact per QQ-C-530 with silver finish, housed in a UL-approved self-extinguishing nylon 6/6 body, and is available in yellow color. It is rated for 5 amps continuous current with a minimum breakdown voltage of 3500 Vrms and maintains a maximum contact resistance of 0.010 ohms, ensuring reliable electrical performance. The contact is protected from flux and solder contamination, and the jack accommodates standard tip plugs with 0.080 inch (2.00 mm) diameter. This test jack is ideal for laboratory instrumentation, circuit board testing, and diagnostic applications where secure, low-resistance electrical connections are required.