The use of the symmetric pin allows {TAIL ~ automatic insertion} of the pin in that {HEAD ~ the orientation} of the pin relative to the board is unimportant 
The use of the symmetric pin allows { TAIL ~ automatic insertion } of the pin in that { HEAD ~ the orientation } of the pin relative to the board is unimportant
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH