The 105-0757-001 is a horizontal test jack designed for standard insulated probe applications with silver plating finish. It features a copper aluminum alloy contact material with a nylon 6/6 body per ASTM D4066, providing durability and electrical insulation. The jack is rated for 5 amps continuous current with a minimum breakdown voltage of 2100 Vrms and a maximum contact resistance of 0.010 ohms for the silver-plated version. The design includes contact protection from flux and solder, probe access from both ends or top, and UL-approved nylon for self-extinguishing properties. This test jack is commonly used in test and measurement equipment, laboratory instrumentation, and electronic testing applications where reliable probe connections and electrical isolation are required.