Screw terminal socket for use with 8/11-pin plug-in relays (model C42 & C43). Mounting arranged either directly on panel or via DIN-46377 Omega rail. Terminals mounting large self-rising screws ideally suited for multi-lead wirings, consenting even removing the screws in order to use this socket into any appliances requiring wiring with ring-type high quality terminations, as normally prescribed by many ultra sophisticated safety specifications and/or quality standards (militaty, railways, security, etc.).