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.