hold the die segments in the proper positions during periods when the joints are not being made or broken plates 92 are small because the die segment 90 and die 91 pivot only through a small angle about the vertical pivot axis a typical small angle of pivoting is 5 u00b0 being vastly less a small fraction than the angle through which die segment 81 associated with hook end 47 may pivot in the present embodiment pivoting of the die segment on the head is stopped by brute force by strong stop means in the previous embodiment of hook end die means and in all die means of the cited patent pivoting of the die cease by friction and not by action of stop means there are wide thick top and bottom arcuate flanges 90a that seat above and below plate 39a these flanges are in recesses in top plate 42a and in the unshown bottom plate there being radial gaps g between these elements radially outwardly of the flanges 90a the slots 94 and associated pins 93 do not at all control the angle through which die segment 90 pivots during mounting on the joint section or during actual torquing slots 94 are so long that their ends never contact pin 93 the pivot.