OZ-Gedney Type KC Center Stopped 4-Screw Clamp Connector, Size: 3-1/2 IN, Connection: Male NPS Hub X Screw Clamp, Conductor Range: 3-23/32 - 4 IN, Malleable Iron, Finish: Zinc Electroplated, Dimensions: 4-13/16 IN Length X 6-1/2 IN Width, Third Party Certification: UL File Number E-11853, CSA 9795, Applicable Third Party Standards: UL 514B, CSA C22.2 No.18, Federal Specification W-F-406E, NEMA : FB-1, For Armored Cable, Flexible Metal Conduit, Interlocked Metal Clad Cables, Non-Metallic And Service Entrance Cable