Square Head Close-Up Plug | Circuit Protection | For Use With Carflex Conduit and Carflex X-Flex Conduit | For Use With Threaded Rigid Metal Conduit and Imc | To Connect Threaded Metal Conduit to a Threadless Opening in a Box or Enclosure | Use Through Knockout to Connect Box to Conduit Coupling, Use With Locknut to Connect Two Boxes Side by Side | Used With Locknut to Terminate Rigid and Imc Conduit to an Enclosure, Provides a Smooth Pulling SurfaceFurbay Electric Supp