A a threaded rod or screw 28 extends freely through {HEAD ~ bores} in {TAIL ~ the flanges} 26 and 27 
in
A a threaded rod or screw 28 extends freely through { HEAD ~ bores } in { TAIL ~ the flanges } 26 and 27
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH