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