housing 20 has a mating tapered surface 24 which when it contacts tapered surface 22 longitudinally orients housing 20 with respect to top connection 1 rotational orientation is still properly required to accomplish this at least one orienting groove or cutout 26 has been machined into top connection 1 for each cutout 26 there is an alignment bore 28 in housing 20 a bolt 30 is advanced through threaded bore 28 until it sticks into and firmly engages cutout 26 once at least one bolt 30 is inserted into a cutout 26 the radial orientation between housing 20 and top connection 1 is obtained that orientation can be secured with set screws not shown inserted through threaded bores 32 and 34 at that point not only is housing 20 properly oriented but its orientation is properly secure as a result of such orientation bore 36 in top connection 1 is aligned with bore 38 in housing 20 bores 36 and 38 are disposed at an angle with respect to the longitudinal axis of top connection 1 a preferably square thread 40 is located in bore 36 instead of set screw 3 see fig6 a pin 42 see fig7 is installed through aligned bores 36 and 38 threads 44 on pin 42 engage thread 40 in bore 36 fig7 outlines the assembly procedures for the installation of pin 42 after aligning housing 20 as previously described the cover 46 see fig2 is removed allowing access to bore 38 for installation of pin 42 pin 42 is advanced and rotated into threads 40 until tapered surface 48 is in an orientation about 180 u00b0 opposed from that shown in fig7 the orientation of surface 48 is determined by the orientation of bore 50.