Standard Quick Wire Sockets Standard in-line quick wire sockets allowing rapid termination of wires available in thermocouple types K, J, T, E, N, R/S and B. These standard thermocouple plugs have an easy 'jab in' connection for rapid termination . Accepts standard round plug pins Contacts are polarised to prevent incorrect connection Color coded in accordance with JIS specification Maximum continuous operating temperature 220 °C