For example, {HEAD ~ bolt} 2 may have therein {TAIL ~ a suitable number}, e.g. four, of preferably radial threaded bores 15, preferably equally spaced about the circumference of bolt 2 
have
For example , { HEAD ~ bolt } 2 may have therein { TAIL ~ a suitable number } , e.g. four , of preferably radial threaded bores 15 , preferably equally spaced about the circumference of bolt 2
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH