Uni-Lock Connectors 3/4 Turn Lock. Attachable to customer's cable. Available with/without pilot pins. Full line of plugs and receptacles. All parts thoroughly insulated and/or grounded. Lockable against accidental disconnect. Water-tight. Meet mine Health and Safety Standards. Suitable for mining: shuttle cars, cutting machines, drills, distribution boxes. Industry: large motors-test stands for checking motors, lockable hookup for large portable equipment, steel mills-provide power for locomotion equipment. Military: provide ship-to-shore power. Railroad: carry power from car-to-car.