Versatile and reusable set screw connectors made from high strength 6061-T6 aluminum alloy for superior electrical and mechanical performance. Tin plated for low contact resistance. Suitable for use with both copper and aluminum conductors. Rated 600 Volts. Meets or exceeds ANSI C119.4 Class a specifications. Mounting hole spacing is 1-3/4-inches center to center. Also available with the following options: clear plating, anodized set screws or disc pad screws. Mounting hole: 2. Number of conductors: 3.