Snap-on bead assemblies for providing blocking walls for the attachment of connectors, and more particularly quick connectors, are disclosed as comprising an open-ended ring member having an outer surface, an inner surface and two extending flanges. The ring members are formed of a resilient material, such as high gauge steel, which allows the ring members to be expanded and positioned over a tubular conduit. In a first embodiment, the flanges (16a) and (16b) project downwardly and embed within depressions (34) formed upon outer surface (32) of the conduit (30) to lock the ring member (10) onto the conduit. In the second enbodiment, the flanges (116a) and (116b) project upwardly and the inner surface (114) of the ring member (116) is positioned within a depression (134) formed on the surface (132) of the conduit (130) which locks the ring member (110) onto the conduit (130).