A clutch andor brake unit is described with at least three components that can rotate relative to each other, each of which is connected, fixed against rotation, with at least one disk. Other applications are envisioned and different techniques for replacing the spring component in such valve assemblies are also contemplated. The male member includes in this embodiment eight grooves unevenly spaced so that the partially hardened container formed in the injection mould can be pushed from the mould using the ejection flange while the container is sufficiently green to enable the ribs formed in the grooves to move over the surface of the male mould during the ejection process.