Morris Products 90328 Split Bolt Connector, Used With Copper Conductors, 4/0-250 AWG, 250 - 250 Max Run To Max Tap, 4/0 - 8 Min Run To Min Tap, 250 - 8 Max Run To Min Tap, 1 - 1 Min Equal Tap and Run, 500inlb Toque Split Bolt Connectors For Copper Conductors - This Split Bolt Connector for Stranded Wires is durable and easy to use Split bolt connector is UL listed for Copper and Copper weld stranded wires only Manufactured from compact, high strength, high copper alloy Free running threads and easy to grip wrench flats Highly resistant to season cracking and corrosion