The aperture and associated shaft end which form the universal joint have {HEAD ~ corresponding non circular cross sections} for enabling {TAIL ~ a slip fit connection} 
for enabling
The aperture and associated shaft end which form the universal joint have { HEAD ~ corresponding non circular cross sections } for enabling { TAIL ~ a slip fit connection }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL