Abstract: Each one of a series of die parts is secured to and located within a precise position on a common die shoe by means of two joint structures. In each joint structure, a sleeve of a fixed length and diameter is telescoped with a slip fit into a longer opening extending through the die part and into the die shoe to precisely locate the die part on the shoe with respect to the other die parts and with respect to the shoe. The inside diameter of the sleeve is larger in diameter than the diameter of a screw which extends through the sleeve and is threaded into a hole in the die shoe to secure the part on the shoe regardless of whether the axis of the screw coincides precisely with the axis of the sleeve. When mounting the die part on the die shoe, the part first is clamped on the die shoe in an initially accurate position with a bore defining the portion of the opening in the die part serving to locate the position of the hole to be drilled and tapped in the die shoe.