A semiconductor memory cell structure and method for forming the same. The flapper valve is made of a frangible material adapted to shatter upon impact from an impact sleeve. A die is then forced into the end of the pipe, the die having an outer diameter sized to increase the inner diameter of the end of the pipe to the nominal inner diameter of the end of the connector. The support projection is arranged and configured to secure the coupling member against forward and rearward longitudinal movement.