Schützinger Bench & Research and Development Spring-loaded plug 615192 - Schutzinger DI FK 9 L Au / RT, The Schützinger DI FK 9 L Au / RT is a spring-loaded plug featuring a 4mm straight blade connector for secure laboratory connections. This safety jack plug is ideal for creating reliable and safe electrical connections in diagnostic and testing environments. Its robust construction and gold-plated contacts make it suitable for various precision instrumentation applications. Schützinger DI FK 9 L Au/RT Spring-loaded Plug Red 1 Piece Solder Connect