Threaded Tube Connectors for square or round tubes are specially designed to eliminate welding when connecting tubes together. We supply this component in different  outside diameters and thread size. Made from a high quality spring steel, which helps to promote a long-lasting and heavy duty solution. Round tube connectors are unique in the sense that they allow for the barbs to expand once inside of the desired application, providing a secure and tight fitting that massively overpowers the strength of our standard plastic threaded inserts.