If the first member is not counter bored to provide a retaining shoulder 50 as shown in FIG 4, Prior to assembly, any necessary annular grooves are defined in member 11 or {HEAD ~ member} 13 to receive {TAIL ~ retaining snap rings} 51 
to receive
If the first member is not counter bored to provide a retaining shoulder 50 as shown in FIG 4 , Prior to assembly , any necessary annular grooves are defined in member 11 or { HEAD ~ member } 13 to receive { TAIL ~ retaining snap rings } 51
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH