Killark pin & sleeve mechanical interlocks are suitable for supplying power to portable / fixed electrical equipment including welders, pumps, blowers and generators. These receptacles are ideal for hazardous locations and feature plug interlock mechanism that ensures the switch remains in OFF position in case of partially inserted plug. Additionally, their OFF position is pad-lockable for ensuring maintenance & safety. Choose from a wide range of these receptacles, available in 30 & 60 amperage options on Raptor Supplies. Watertight mechanical interlocks (mechanical interlock devices) featuring thermoplastic material are also available.