EMT Set Screw Connectors with Insulated Throat 4" - Steel - EMT Set Screw Connectors are Used To Secure EMT Conduit in an Enclosure.EMT Set Screw Connectors - Steel - Insulated Throat 4" features include: Use to connect EMT Conduit to Steel Outlet Box, Load Center, or other Metal Enclosures Insulated Throat Concrete Tight (When Taped) Pre-Set/Pre-Staked Combo Head Set-Screws Male NPS Hub Thread Steel Also cULus Listed for use with Rigid IMC cULus Listed Order Qty of 1 = 1 Piece Below is more info on our EMT Set Screw Connectors - Steel - Insulated Throat 4"