FeaturesRACO® set screw connectors are suitable for applications above 600 VACRACO® steel set screw connectors provide concrete-tight connections when tapedAll steel construction insures mechanical protection for the racewayTri-head screws may be installed using a slotted, Phillips or Robertson head screwdriver2-1/2 in to 4 in trade sizes are also UL listed for use on Rigid/IMC conduit, allowing for design and installation flexibilityAll components are zinc electroplated for corrosion protection1/2 in to 1 in trade sizes have one set screw, 1-1/4 in to 4 in trade sizes have two set screws0.07 in THK