Threaded bolts 16 can be screwed into bores 15, and bolts 16 extend through and are fixed against lateral displacement by {HEAD ~ an outwardly projecting flange} of {TAIL ~ collar} 27 of door body 6 
of
Threaded bolts 16 can be screwed into bores 15 , and bolts 16 extend through and are fixed against lateral displacement by { HEAD ~ an outwardly projecting flange } of { TAIL ~ collar } 27 of door body 6
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 HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH