{TAIL ~ Each} of the inside surfaces of {HEAD ~ the two external washers} comprise an actuation plane corresponding to one of the associated lateral retaining elements 
{ TAIL ~ Each } of the inside surfaces of { HEAD ~ the two external washers } comprise an actuation plane corresponding to one of the associated lateral retaining elements
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH