Morris 90316 Bolt Connector for Copper Conductors Bolts Type Number-6 Wire Range 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