Versatile and reusable set screw connectors made from high strength 6061-T6 aluminum alloy for superior electrical and mechanical performance. Two set screws per wire hole ensure an exceptional connection. 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 13/4” center to center. Also available with clear plating, anodized set screws or disc pad screws.