The Napa Echlin ST53 is a vintage 6V starter solenoid designed for Ford F1 and F4 trucks, as well as Studebaker 3R5 models. This bolt-on solenoid features a matte finish and three terminals for easy installation. It is a reliable component with interchange part numbers such as 1M1095 and SW82, suitable for classic vehicle restoration projects. This American-made solenoid is not a universal fitment and comes with OE/OEM part numbers B5A11450A and FAB11450B, providing a direct replacement option for specific Ford and Studebaker models.