Schützinger Bench & Research and Development Spring-loaded plug 615192 - Schutzinger DI FK 9 S Ni / RT, The Schützinger DI FK 9 S Ni / RT spring-loaded plug is a single-piece jack connector designed for laboratory use, featuring a 4mm safety jack socket. Manufactured by Schützinger, this robust connector is ideal for secure and reliable electrical connections. It is commonly used in testing and measurement applications where safety and precision are paramount. Schützinger DI FK 9 S Ni/RT Spring-Loaded Plug Red Screw Connection 1pc