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