Abstract: A casting die having separate die segments that cooperate to form an internal die cavity for receiving molten metal at the top thereof for subsequent solidification and removal therefrom in continuous strip or bar form. Novel retaining means in the form of cooperating bolt/bushing sets are provided for maintaining the relative positioning of the segments, the bolts having a lower coefficient of expansion than that of the bushings, so that upon heating of the die, the relatively greater expansion of the bushings will serve to place a continuing force upon the segments through bolt tensioning so as to maintain the die segments in face-to-face relationship and to eliminate possible flashing of metal therebetween.