{TAIL ~ A nut} is threaded onto {HEAD ~ the outer end} of the bolt and contacts the sleeve, so that rotation of the nut moves the sleeve axially of the bolt to adjust the pressure of the spring on the locking bar 
{ TAIL ~ A nut } is threaded onto { HEAD ~ the outer end } of the bolt and contacts the sleeve , so that rotation of the nut moves the sleeve axially of the bolt to adjust the pressure of the spring on the locking bar
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH