Moulded plastics tubular couplings

摘要

The disclosure relates to a molded plastics tubular coupling comprising a plastics sleeve having an integral head at one end. The sleeve provides a cylindrical outer surface to engage in a corresponding bore of another component. The surface has an encircling annular recess and an integral radially extending flexible annular diaphragm formed in the recess. The diaphragm has an outer periphery extending proud of the cylindrical surface to engage and grip the corresponding surface of another component.