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