Glossary A-CC-CD-EF-GG-II-MN-PP-SS-SS-TT-VW Nozzle the outlet end of a gooseneck or the tubular fitting that joins the gooseneck to the sprue hole. Overflow well-a recess in a die connected to a die cavity by a runner to assist in proper venting. Parting line (A) a mark left on a die casting where the die halves meet. (B) mating surfaces of the cover and ejector portions of the die. Platen portion of a casting machine against which die sections are fastened or of presses against which trim dies are fastened. Plunger ram or piston which forces molten metal into die.