Since {TAIL ~ the smaller diameter parallel thread part} 15 has {HEAD ~ so small diameter}, the steel plate is seldom deformed 
Since { TAIL ~ the smaller diameter parallel thread part } 15 has { HEAD ~ so small diameter } , the steel plate is seldom deformed
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH