A nut is threaded onto 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 {HEAD ~ the spring} on {TAIL ~ the locking bar} 
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A nut is threaded onto 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 { HEAD ~ the spring } on { TAIL ~ the locking bar }
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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL