Hubbell Wiring Device-Kellems pin & sleeve connectors are ideal for sealing power connections while preventing disconnection under loads. These 3 pole devices feature nickel plated solid brass pins for providing a reliable electrical connection, even in corrosive environments. The external cord clamps provide maximum cord retention to maintain secure terminations. They also feature non-conductive nylon housing and a lockout hole in the plug shroud to provide additional safety. We also offer pin & sleeve receptacles with non-metallic housing to withstand harsh industrial environments while efficiently sealing connections.