the first diameter of {HEAD ~ said first parallel thread part} is {TAIL ~ substantially 3.55 mm}; and 
the first diameter of { HEAD ~ said first parallel thread part } is { TAIL ~ substantially 3.55 mm } ; and
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH