The drilling screw 11 comprising {HEAD ~ the parallel thread part} 13 and the smaller diameter parallel thread part 15 which are connected through {TAIL ~ the taper thread} part 14 
connected through
The drilling screw 11 comprising { HEAD ~ the parallel thread part } 13 and the smaller diameter parallel thread part 15 which are connected through { TAIL ~ the taper thread } part 14
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH