{HEAD ~ The hub} 8 axially extends through {TAIL ~ both the hub collars} and both the spacer collars 15 and 16 
{ HEAD ~ The hub } 8 axially extends through { TAIL ~ both the hub collars } and both the spacer collars 15 and 16
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH