Appleton and O-Z/Gedney threadless compression couplings are used to join lengths of rigid metal conduit. Threadless compression connectors are used to secure and terminate rigid metal conduit to enclosures. Threadless set-screw couplings are used to join lengths of rigid metal conduit and IMC. Threadless set-screw connectors are used to secure and terminate rigid metal conduit and IMC to enclosures."